他们希望通过清洁牙齿和检查身体来预防疾病。
They hope to prevent being sick by having their teeth cleaned and their health checked.
清洁，调节安全阀，检查是否有磨损和肮脏的阀门。
Clean, adjust relief valve -, check for worn and dirty valve.
检查和清洁油藏。
也检查所连接的管道是否清洁，没有碎片和毛刺。
Also check that the adjoining pipework is clean and free from debris and burrs.
检查你的屏幕的亮度最大值和清洁。
Check your screen has its brightness at maximum and is clean.
检查镜子、镜框和行李架确保清洁并处于良好的状态。
Check mirror, mirror frame, luggage rack if it is in a good condition with cleanliness.
检查镜子、镜框和行李架确保清洁并处于良好的状态。
Check mirror, mirror frame, luggage rack if it is in a good condition with cleanliness.
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