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A likely explanation for this involves the fact that intercontinental migrations require both a land bridge connecting the two continents and the suitable habitat both on and across that land bridge.

对此，有一种可能的解释是，洲际迁移既需要连接两个大陆的大陆桥，也需要大陆桥上和桥对面存在合适的栖息地。

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And, this involves the reaction of titanium tetrachloride with magnesium to form magnesium chloride plus titanium And, this was invented in 1937 by W. J. Kroll.

四氯化钛和镁，反应生成氯化镁和钛，1937年W。J。克劳尔发明了这个方法。

youdao

But this is different. It involves the war, the ownership of human beings and the future of the divided nation.

VOA: special.2010.05.10

There's also another transition that he's making, and this involves the subject of virginity: not a speechlessness, but his actual abstinence.

他还做了另一个转变，这涉及到童贞的话题：,不是哑口无言，而是他实际的节制。

耶鲁公开课 - 弥尔顿课程节选

And, this involves the reaction of titanium tetrachloride with magnesium to form magnesium chloride plus titanium And, this was invented in 1937 by W. J. Kroll.

四氯化钛和镁,反应生成氯化镁和钛,1937年W。J。克劳尔发明了这个方法。

麻省理工公开课 - 固态化学导论课程节选

Because this involves the interests of countries and not all of these are going to be resolved easily.

WHITEHOUSE: G20 Summit Presidential Press Conference

In the case of gold, this involves the incentive for competitive devaluations of paper currencies, as well as persistent geopolitical uncertainty.

FORBES: That's Gold, Jerry! Gold!

But those who E-file and have their refunds electronically deposited in their accounts will continue to get their money, since this involves the same processing functions that the government uses to debit money due on E-filed returns.

FORBES: If Government Shuts Down, E-File To Get Your Tax Refund