Leading institutions are using their teaching and research stars -- not adjuncts or tas -- in their moocs .

顶尖商学院正在安排教学和科研明星（而不是兼职教授或助教）参与MOOC课程。

This is lynda paul who will be one of our principal tas here .

琳达会是我们这门课上的主要助教。

Ever since early this century , electricity tas become an essential part of our life .

自从本世纪初开始，电就变成了我们生活中重要的部分。

We employ a real chef for the preparation of the soup so it is indeed tas ty and very special .

我们雇了一位真正的厨师来做汤，做出的汤的确可口，风味也十分独特。

I 'll get the tas to do them .

我让助理去办了。