air suction

• 吸气

air suction的用法和样例：

例句

1. He sucked hard for air to keep breathing.
   他拼命吸气以维持呼吸。
2. When we breathe,we draw air into our lungs.
   当我们吸气时，把空气吸入肺里。
3. After refilling ink, extract a little ink using suction tool.
   填充墨水后用抽气工具将少许墨水抽出。
4. It possesses vacuum air bleeding and vacuum oil adding function.
   具有对电力设备真空抽气和真空注油功能。