16世纪和19世纪北也门成为奥托曼帝国的一部分；在一些时期，伊玛目控制了南也门。
By the 16th century and again in the 19th century, north Yemen was part of the Ottoman Empire, and in some periods its Imams exerted control over south Yemen.
人力资源十分昂贵，而且与大型采购项目——例如英国将来的航母项目，这一项目受到严格规定的合同保护——相比是更易受攻击的目标。
Manpower is both expensive and a softer target than big procurement programmes, such as Britain's future aircraft-carriers, which are protected by tightly drawn contracts.
下一节目五分钟后开始，现在先播放些音乐。
The next programme starts in five minutes: in the meantime, here's some music.
过程很简单：两个陌生人轮流问对方36个问题，问题越来越私人化，然后四目相对，一言不发地对视4分钟。
So the procedure is fairly simple: two strangers take turns asking each other 36 increasingly personal questions and then they stare into each other's eyes without speaking for four minutes.
下一节目五分钟后开始，现在先播放些音乐。
The next programme starts in five minutes: in the meantime , here's some music.
下一节目五分钟后开始，现在先播放些音乐。
The next programme starts in five minutes: in the meantime, here's some music .
亚历山大市的学生说，惊奇的是自己对于这一项目竟十分喜欢。
Students in Alexandria said that they were surprised that they actually like the program.
本文解剖观察了我国有代表性的鲨类脑颅共32种，分隶于8目14科24属。研究结果认为鲨类的脑颅共可分为9个式型和12个亚型。
This paper presents a comparative study on the neurocrania of 32 representative species of sharks of China, belonging to 24 genera, 14 families and 8 orders.
本文解剖观察了我国有代表性的鲨类脑颅共32种，分隶于8目14科24属。研究结果认为鲨类的脑颅共可分为9个式型和12个亚型。
This paper presents a comparative study on the neurocrania of 32 representative species of sharks of China, belonging to 24 genera, 14 families and 8 orders.
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