circumstance与situation有何区别

circumstance意为"环境,情形,情况",常用复数形式,表明与某事件或某人有关的情况,环境,境况等. He was forced by circumstances to do this. situation意为"情形, 境遇, (建筑物等的)位置" The situation was not good for her. 区别主要在一些搭配上吧，如in the situation, under no circumstance。