在大多数情况下

From gentlefolk down to the very poor, were divided into two groups without their choice, and in most cases, without their knowledge; one group being supplied with water containing the sewage of London, and, amongst it , whatever might have com from cholera patients, the other group having water quite free from such impurity.

显然，没有实验能设计来说明水的供应对霍乱传播进程的影响，这个实验的范围也是最大的。不少于三百万人，男女老少，各个阶层，从绅士到穷苦人，在他们不能选择，且大多数是不了解情况的条件下，被分成了两组；一组喝含有伦敦污水的水，其中有来自霍乱病人的排泄物，另一组被供应绝对不含此类不净物的水。

Safety tip: run speed control back to zero before restarting, or don't restart at all. The idea is to avoid restarting at full speed; many machines have lockout to prevent this.

安全小贴士：当重新启动主机的时候一定要把主机转速设定值回归到零位，这主要是避免在高速下重新启动机器，大多数机器有锁可以这种情况发生。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。