哪位英语大神帮助翻译下，不要是google翻译的拉来，多谢了。。
对工作的自信是非常不同的自信，因为这是对你自己的信任而非假设你的是唯一的方案或者你的是更好的。
The number of test item bank which systematically summarizes the test questions of linear algebra is limited.
Soil samples were collected randomly up to a distanceof 20 km from four directions around the closed Kabwe
mine.
土壤样品从 Kabwe 矿四个方向20米处随即采取。
Control samples were collected from Tobwe
Estate, Bonanza, Moyo and Makombe Farms near
Kabwe and Golden Valley, Kyindu farms as well as
Chalimbana International Conservation Research for
Agro-Forestry(ICRAF)/Southern African Development
Community (SADC) station near Lusaka.
收集的样本来自Tobwe
Estate, Bonanza, Moyo and Makombe Farms near
Kabwe and Golden Valley, Kyindu farms as well as
Chalimbana International Conservation Research for
Agro-Forestry(ICRAF)/Southern African Development
Community (SADC) station near Lusaka.
这些地方。
Samples were
collected and analysed over a period of 12 months, from
April 1991 to May 1992.
样本收集和分析期为12个月，从1991年4月到1992年5月。
At least three composite soil
samples were collected from each sampling point.
每个点最少取样为3个。
Soil
samples were collected into transparent plastic bags
using a steel Auger from a depth of 0–15 cm. Samples
were air-dried in the laboratory by spreading out on
transparent plastic on a bench for several days.
土壤样本用钢制回旋钻从0-15米处取出，用塑料袋装。样本在实验室里，陈列在台子上自然风干数日。
They
were then passed through a 2 mm sieve and repacked
in transparent plastic bags until they were analysed.
然后用2毫米的沙漏筛过，再重新装包，等待分析。
20 g of sieved air-dried soil samples were placed in well
cleaned 250 cm3 conical flasks and 100 cm3 of 0.5 M
nitric acid was added.
20克风干，筛选过的样本放入250毫升的烧瓶加入0.5M 硝酸。
The flasks were mechanically shaken
for at least 30 min using a mechanical shaker.
机械摇动30分钟。
The
samples were then filtered into 100 cm3 plastic bottles
through ashless Whatman filter paper 40.
之后通过无灰滤纸40，放入100毫升瓶子中。
Some control
samples were analysed for background target analytes
and then spiked with known amounts of cadmium, copper,
lead and zinc and passed through the whole process
to determine the recovery rates of extraction procedure.
通过需要分析的背景目的分析铬，铜，铅锌。通过分析过程决定矿物质提取方法。
The differences between the background concentrations
and the concentrations of the spiked samples accounted
for the percent recoveries.
对照样品含量检测结果和已知的历史记录。
General purpose reagent cadmium
nitrate of a minimum purity of 99% was used in
the preparation of solutions used to spike the samples
for cadmium.
用最小99%纯度的硝酸溶液检测铬。
An analytical grade of a nitrate salt of lead
and analytical grade granules of copper and zinc were
used in the preparation of solutions used in the spiking
of samples for lead, copper and zinc.
利用已知含量的硝酸铅和铜、锌颗粒掺入备好的溶液检测铅、铜锌。
A reagent blank
for each metal was also prepared and passed through
the whole process and used in the determination of samples
for the chosen metals.
其他的一样做。
Calibration curves were prepared
using analytical grade metals and metal salts.
利用测定曲线分析金属和金属盐含量。
Cadmium, copper, lead and zinc were determined using
a Varian Techtron AA6 atomic absorption spectrophotometer
using corresponding metallic hollow cathode
lamps.
太专业不懂。。。。
Acetylene gas was used as the fuel and air as
the support.
乙炔可用作燃料。
An oxidising flame was used in all cases.
所有的用火。
Table 1 shows the different parameters at which the
instrument was set for each metal.
表1给出每种金属参数。
Calibration curves were used to calculate the concentrations
of four metals. A reagent blank was used to zero
the instrument. This was followed by aspiration of standard
solutions and finally the soil sample extracts were
Calibration 曲线用来计算4种金属含量。空着的是0.这步之后土壤样品就分析好了。
分太少，就这吧，大概结构应该能看懂了。专业的东西你自己再查查。这是教材里的东西吗？我是矿业工程师。
头晕..
我觉得划不来0..0
我也觉得，我上次问个保研的问题还花了一百分，给分太少了
土壤样本，随机抽取到的距离20公里左右，从四个方向封闭卡布韦我的。控制样品采自Tobwe村，脐橙，Moyo和马孔贝农场附近卡布韦，金山谷，Kyindu农场以及查林巴纳国际保护的研究农业林业（农林中心）/南部非洲发展共同体（南共体）卢萨卡附近的车站。样本收到超过12个月期间，从分析1991年4月至1992年5月。至少有三个复合土样品采自各采样点。土壤抽取样本，将透明塑料袋使用一组0-15厘米深度钢螺旋。样品在空气干燥的实验室分散在透明塑料的长凳上几天。他们然后通过1 2毫米筛和重新包装在透明的塑料袋里，直到他们进行了分析。克筛20空气干燥土壤样本被放置在良好清理二百五十立方厘米锥形瓶和1000.5立方厘米M硝酸加入。该瓶的机械震动至少30分钟用机械振动筛。那个样本然后过滤到一〇 〇立方厘米塑料瓶通过无灰滤纸过滤纸40。一些控制样本的背景，目标分析物然后增大，镉，铜为已知数额，铅，锌，整个过程通过确定提取工艺的回收率。背景浓度之间的差异及占尖刺样品的浓度回收率为百分之。通用试剂镉硝酸盐的99％的最低纯度用所使用的尖峰样品制备解决方案镉。一个一硝酸铅盐分析纯与铜和锌分析纯颗粒用于在解决方案，用于准备扣球对铅，铜和锌的样本。阿试剂空白每种金属也准备和通过整个过程和使用的样品测定所选金属。校准曲线准备使用分析纯金属和金属盐类。镉，铜，铅，锌的确定，采用1瓦里安Techtron AA6原子吸收分光光度计使用相应的金属空心阴极灯。乙炔气体用作燃料和空气的支持。一个氧化火焰被用于所有情况。表1显示了在不同的参数文书为每种金属。校准曲线，用于计算的浓度四金属。阿用试剂空白为零该文书。其次是标准的愿望最后的解决方案和土壤样品提取液送气。
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