您要查找的是不是：
- Rocks are worn smooth through the agency of water. 岩石由于水的作用而变得光滑。
- Iron is melted by the agency of heat. 铁由于热能的作用被融化。
- New means must of necessity be had recourse to. 人们必然求助于新方法。
- The doctor asked us to call him during the night except in case of necessity. 医生吩咐我们，除非必须，否则不要在夜里叫他。
- Being short of money, I made a virtue of necessity and gave up smoking. 我因缺钱，倒也乐得把烟戒了。
- Any statesman is in part the prisoner of necessity. 任何政治家都或多或少地是一些当务之急事情的俘虏。
- We would make a virtue of necessity. 我们要把迫不得已而为的事装成出于好心而为。
- Through the agency of friends he was set free. 由于朋友的奔走，他得以释放。
- He did so under the stress of necessity. 他受情势所需的压迫而这样做。
- These measures grow out of necessity. 采取这些措施是由于需要。
- An example is the best agency of instruction. 实例是最好的说明手段。
- We must all, of necessity, die sooner or later. 我们大家迟早都会死。
- Invention is the mother of necessity. 发明是需要之母.
- It is more a matter of necessity. 更确切地说那是一件不得以的事。
- Through the agency of relatives he got the position. 通过亲戚的周旋,他得到了那个职位。
- They have to do this test of necessity. 他们出于需要不得不做这项试验。
- They had transacted business by the agency of a broker. 他们通过中间人做交易。
- He is member of the party in power, so, of necessity, he should say what the government is favour of. 他是一个执政党的党员，因此他当然应该说些政府赞成的话。
- Carbon dioxide is converted into oxygen through the agency of plants. 二氧化碳由於植物的作用转化为氧气。
- He obtained his position by/through the agency of friends. 他通过朋友的帮助得到了一个职位。
