1.
buckle on one's belt
把自己的皮带系紧.
2.
The tent flags should be tightly fastened.
帐篷的帘布应紧紧系
3.
The tent flaps should be tightly fastened.
帐篷的帘布应紧紧系住.
4.
"Oh, never mind. It does not matter. "
噢,没关系,不要紧。
5.
Oh, never mind. It doesn't matter.
噢，不要紧。没关系。
6.
a tight lid;tight screws;a tight knot.
很紧的盖子；拧得很紧的螺丝钉；系得很紧的结
7.
fasten one's belt
束紧皮带，系上皮带
8.
fuel jettison shutoff valve
紧急放油系统断流活门
9.
enclosed medical gas system
紧闭式医用气体系统
10.
Never mind, it doesn't really matter.
没关系。真的不要紧。
11.
emergency bed request system
紧急试验台请求系统
12.
DIERS = Design Institute for Emergency Relief System
紧急救援系统设计院
13.
The safety helmet is held on by an elastic strap.
安全帽用一根松紧带系
14.
EMATS (Emergency Message Automatic Transmission System)
紧急信息自动传输系统
15.
Relations are rather strained at present.
目前关系有些紧张.
16.
Emergency Management Information System
紧急情况管理信息系统
17.
Second, the tense relations between large countries have been relaxed.
二是大国关系由紧趋缓。
18.
Close Relations Between Hong Kong and the Inland
两地传媒要有紧密联系