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- keep the vacuum constant 保持真空度不变
- When power is connected, pipes at P and A will be put through, and when power is disconnected, pipes at P and A will be cut off, to keep the vacuum system at P vacuum. 当通电时将P、A端管路接通、断电时切断P、A端管路,保持P端真空系统的真空度。
- When power is connected, pipes at PA will be put through,when power is disconnected, pipes at PA will be cut off, to keep the vacuum system at P vacuum. 当通电时将P、A端管路接通、断电时切断P、A端管路,保持P端真空系统的真空度。
- Please keep the watch for me while I go swimming. 我去游泳,请代我保管这表。
- The porter turned off the vacuum. 清洁工关掉真空吸尘器。
- Keep the sun behind you when you take a photo. 拍照时要让太阳留在你的身后。
- Here's a five-pound note-- you can keep the change. 这是五镑的钞票--零钱不用找了。
- I try to keep the boy out of mischief. 我尽量不让这个男孩胡闹。
- He give me a box in which to keep the toy. 他给了我一个装着玩具的盒子。
- Firemen managed to keep the fire under. 消防队员尽力控制了火势。
- Our instructor told us to keep the room locked. 我们的教导员告诉我们把那间房锁上。
- The vacuum valve opens to admit air. 真空阀开启以补充空气。
- Keep the potatoes on the simmer for ten minutes. 把马铃薯炖十分钟。
- An extension for the vacuum cleaner. 真空吸尘器容量加大。
- Let's keep the conversation on a friendly plane. 让我们友好地谈话。
- Pull the plug before you try to fix the vacuum. 修理吸尘器前,先拔掉电源。
- The vacuum sucked the dirt off the floor. 真空吸尘器吸起地板上的尘土。
- For one thing they keep the water clean. 一方面,他们可以保持水的清洁。
- Keep the wire stretched tight don't let it kink. 把铁丝拉紧,别让它扭成结。
- The vacuum cleaner is acting up again. 真空吸尘器又出毛病了。