It is likely that the "s" strain is the ancestral species because it is found all over sub-Saharan Africa, whereas the "M" strain is concentrated on central and west Africa.

S类可能是更原始的种群因为它被发现存在于撒哈拉沙漠以南的非洲的各地。

youdao

Sadly — although the tour is for over 21's only — it is not guaranteed that every visitor will get lucky.

遗憾的是，尽管该活动仅限21岁以上的成年人参加，但不能确保每位游客都能一饱眼福。

youdao

Note also that vs1 cannot access vs2 over the network. It also can't look through vs2's files.

此外还要注意，vs 1不能通过网络访问vs2。

youdao

She is watching over the Capitol building as it continues to represent America's history, government and people.

VOA: special.2010.01.27

R/Cv OK, so that means that this is really instead of -1 R over Cv. it's really gamma minus one.

现在,变成了γ

麻省理工公开课 - 热力学与动力学课程节选

or if it's over a long period of time and it's an ongoing situation that you want to get rid of.

或者是一件持续了很久的事，你特别想摆脱它。

I'm afraid of 课堂 - SpeakingMax英语口语达人

"It's over when it's over, " Mr. Cuomo said at a news conference in New York City on Wednesday.

WSJ: Hevesi 'Pay to Play' Guilty Plea Would Turn Attention to Rattner, Morris

It's not over until God says it's over.

NPR: The Sheards: A Mother-Daughter Gospel Duo

"The police have said there's no public safety issue, it's solved, it's over, " said Dershowitz.

CNN: What's next for the Boston Marathon bombing suspect?