We've run short of milk.

我们牛奶不够了。

Ok, otherwise, we'll run short of time.

好，否则我们将不够时间了。

Yet it run short of systemic study and attention.

但是还缺乏系统的研究，对它的关注还很不够。

No learner has ever run short of subjects to explore.

好学者永远有主题可攻。

We all have a friend who never seems to run short of cash.

我们有的朋友从来不会手头缺现金。