She often said: "You must never so much as think if you like it or not, if it is bearable or not.

VOA: special.2009.07.26

If the person has not mastered the basic concept, the person must fail, must get four or less.

如果他没有掌握基本的概念，那就一定不能通过考试，只得十分之四或更少。

麻省理工公开课 - 固态化学导论课程节选

nd this convergence can never be precisely pinpointed, but must always remain virtual, as is not to be identified either with the reality of the text or with the individual disposition of the reader."

而我们永远无法指出，“…,这种会合的确切位置，这个空间会一直以虚拟形式存在,不论是客观的文本,还是带有个人特征的读者都无法辨别它“

耶鲁公开课 - 文学理论导论课程节选

He said he did not mean that customs or institutions must be the same in every state.

VOA: special.2009.06.11

The northerners said he must not give up any federal property or rights.

VOA: special.2009.07.23

People with type 1, or juvenile,diabetes must keep a watchful eye on their blood glucose levels because their pancreases are not working normally.

VOA: standard.2010.04.15