Suck-filtration

常见例句

• Dangerous currents can suck swimmers under.
  险急的水流能把游泳的人吞没。
• "Suck in those stomachs, " the gym teacher said.
  体操老师说："深呼吸，收腹"。
• Don't suck your thumb; it's so dirty.
  别舔手指头，太脏了。
• She suck up to him by agree with everything he say.
  她巴结他，他说什么话她都同意。
• Suck on the tube to draw up the water.
  用管子把水吸上来。
• Water can be purified by filtration through sand.
  水通过沙滤可以变清。
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