The enzyme activity of strain S2 improved 12% under the optimal cultural conditions.

S2: I am a farmer. I work on farm.

学生2：我是农民。我在农场工作。

S2 also improved the rate of sperm motility greatly in all;

用药对精子活率也产生了显著的影响，其中S2组对精子活率的提高最为显著；

If s2 equals s1, guess which character you're also changing?

如果s2，=，s1，猜猜哪个字符将会改变？

And actually, I will choose another surface, S2, that maybe looks like that.

实际上，我将选择另一个曲面S2，它看起来应该是这样的。

It is introduced that high performance fan for mine ventilation is designed by S1/ S2 3-D flow theory.

介绍了应用S1/S2三元流动理论设计高性能矿用对旋轴流主通风机。

This indicated that the S, of 2 patients was normal while the S2 was abnormal.

说明这2例心脏病患者的第一心音正常，第二心音不正常。

S2 σ or called power factor which is decisive to the electrical quality of the material.

S2σ或者叫做材料的功率因子，决定了材料的电学性能。

S2 I want to be a teacher.

每组抽一名学生来叙述其他人的理想。

Experimental study of confined shear strength of S2 ice in Liaodong Gulf

辽东湾S2冰侧限剪切强度的试验研究

Analysis of the Influence of Various Loss Models on the Optimization of Air-cooled Turbine S2 Stream Surfaces

不同损失模型对气冷涡轮S2流面优化影响的分析

Medium saline-alkali soil is 0.138 percent of salinity content ( S2);

中度盐碱土（S2，含盐量0.138%）；

S2: He can buy a map, he can find the way with it.

他可以买一张地图，在地图上可以找到去天津宾馆的路。

So that is actually making a copy of the address and putting it in s2.

这实际上是复制一个地址，然后放置在s2中。

In this paper three newly proposed stream ciphers S1, S2 and S3 are analyzed.

对3个新近提出的流密码S1，S2及S3进行了分析。

The effects of amiodarone on thyroid function& analysis of S2 cases

乙胺碘呋酮对甲状腺功能的影响&附32例分析

Flow-field line relaxation solution for S2 relative stream surface with the splitter boundary condition

带分流环的S2流面流场线松弛计算方法与程序

Finally, you could add the character above to S1'and the character to the left to S2'.

最后，可以将上面的字符加入到S1'中，将左边的字符加入到S2'中。

FAWS is developed and applied in S1 flow numerical simulation program firstly.

FAWS首先在准三维S1流面计算中发展和应用。

The results show that S1 can increase the early antioxidant effect for sesame oil;

结果表明，海带中可溶组分S1可以提高芝麻油的早期抗氧化效果；

S1: Because today is Friday. I can go home today.

因为今天是星期五，我可以回家。