外科培训至少需要9年，产科则要11年。

Surgical training takes at least nine years, or 11 in the case of obstetrics.

《柯林斯英汉双解大词典》

违反规则要受重罚。

There are stiff fines for breaking the rules.

《牛津词典》

除非你在为了让自己开心而努力减肥，否则要保持驱动力很高将很难。

Unless you are trying to lose weight to please yourself, it's going to be tough to keep your motivation level high.

《柯林斯英汉双解大词典》

However, for dietary intake, there have been fewer advances like that because it's such a difficult thing to get a hold of.

然而,对于饮食摄入量,和那些比则进步要少,因为这很难把握

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So, if we're going to go to the moon, we're going to go to Mars,we want to be able to produce oxygen, structural metals and photovoltaic materials from in situ resources.

如果我们要去月球上，我们要去火星上，我们则必须要制造,氧气，结构金属和光电材料,就在原地制造。

麻省理工公开课 - 固态化学导论课程节选

And of course it exists in a semiotic relationship to a white light over a street door which means "this is my house; if you wish you can ring the bell but I'd just as soon you stayed out."

当然它是存在于一个语义篇中的,而临街门上的白灯则意味着,这是我的房子，你要进来必须按门铃,但是你最好别进来“

耶鲁公开课 - 文学理论导论课程节选