1.
captive balloon
测低空气象气球，系留气球
2.
The balloon filled out as the gas was pumped into it
把气打进气球的时候，气球鼓了起来。
3.
It may not be a weather balloon .
可能不是气象气球。
4.
These balloons blow up easily.
这些气球易于充气。
5.
the bag containing the gas in a balloon.
气球中存放空气的包。
6.
Air leaked out of the balloon.
空气自气球中逸出.
7.
The child pricked the balloon and it burst.
那孩子在气球上刺了个洞, 气球就爆了.
8.
Blow up balloons and then slowly let out the air by narrowing the opening of the balloons.
吹大气球，然后把气球口放开一点点，放出空气.
9.
Blow up a balloon and use a string to tie up the end of the balloon.
给气球充气并且用一根细线系在气球的尾端。
10.
Blow them up,then allow your Valentine to pop them one at a time!
给气球充气，然后让你的情人逐个地把气球弄爆。
11.
The bag containing the gas in a balloon or an airship.
气囊气球或飞艇上容纳气体的袋装物
12.
Hot air balloons use ordinary air as the lifting gas.
热气球将通用空气拿来当作上升气体。
13.
The balloon will continue to go up until the gas inside equals that outside in density .
气球继续上升，直至气球内部与气球外部的密度相同为止。
14.
The children looked up at the balloons in the air.
孩子们仰望空中的气球。
15.
Balloon help: A first attempt
气球帮助：第1次尝试
16.
The children blew up their balloons.
孩子们将气球吹起来。
17.
The bolloons will start popping any minute now.
气球马上就要爆了。
18.
I'm too frightened to fly in a hot-air balloon.
我害怕乘坐热气球。