Who were to be the subjects of their piracies was a matter that did not occur to them.

当海盗后，该打劫谁，他们倒一点也没想过。

youdao

This is a matter that comes within the jurisdiction of the autonomous region.

这件事是属于自治区权限以内的事务。

《新英汉大辞典》

The proper disposal of abandoned chemical weapons is a matter that bears on the object and purpose of the Convention and constitutes an important integral part of its implementation.

妥善处理遗弃化武攸关公约的宗旨和目标，是公约实施的重要组成部分。

youdao

They have a center,and arms of matter that seem to circle the center like a pinwheel.

VOA: special.2009.04.29

And all this is, is saying that when you take a mixed second derivative, it doesn't matter in which order you take the two derivatives.

麦克斯韦关系的本质是,当你考虑混合的二阶导数时，求导的顺序不影响最后的结果,现在，我们利用这些关系。

麻省理工公开课 - 热力学与动力学课程节选

Obviously, it's not going to be a question identical to something you've done, but it's going to cover that subject matter.

当然不会是你做过的,课后作业的题目，但是会涉及到相关内容。

麻省理工公开课 - 固态化学导论课程节选

Questions over the supplement added to a matter that has already taken many unexpected turns.

WSJ: Testosterone Booster Was in Pistorius's Home

Rarely, if ever, does the news concern a matter that could have a direct, significant economic effect.

FORBES: Is Sale Of Yankees Minor League Team A Sign Of Things To Come?

Federal prosecutors could not resist the urge to exert their authority over a matter that traditionally has been regulated under state law.

FORBES: U.S. v. King: It��s Time for Some Prosecutorial Restraint