他们非常有用，尤其是当你迷路的时候。

They'll be useful, especially if you get lost.

youdao

最后，讲座通常非常有用，可以让你直接看到不同观点的倡导者是如何建立他们的论点的。

Lastly, lectures are often very useful in allowing you to see directly how exponents of different views build up their arguments.

youdao

事实上，传统规范非常有用，因为他们减少了学习的周期且节省了去收集有效性的精力。

In fact, conventions are very useful as they reduce the learning curve, the need to figure out how things work.

youdao

These two relations involving entropy are also useful because they'll let us see how entropy depends on volume and pressure.

这两个涉及熵的关系也非常有用,因为他们告诉我们,熵和体积，压强的关系。

麻省理工公开课 - 热力学与动力学课程节选