Your first responsibility in that role is to make sure the president is well prepared as possible to do his job.

我们的首要任务,是确保总统,做好充分准备,来开展他的工作。

普林斯顿公开课 - 国际座谈会课程节选

It's got exercises for you to do so at the end of each chapter, you do have a task to do.

里面为你准备了练习，所以在每章的结尾，你都有任务要完成。

英语写作：技巧 - SpeakingMax英语口语达人

If I looked within the skin, one of the lower layers of your skin, the connective tissue layer, you'd find many fibroblasts there and they're just waiting in a more rounded shape than this, just waiting to do their job.

如果观察皮肤,更深处的一层细胞,结缔组织层,就能看到许多成纤维细胞,它们平时形状接近圆形,时刻准备着去完成自己的任务

耶鲁公开课 - 生物医学工程探索课程节选