The children also were taught proper hand-washing techniques.
研究人员还教了孩子们正确的洗手方法。
To bring a hand gun into Hong Kong without proper authorization is a serious offense.
未经适当授权将手枪带入香港是严重罪行。
When's the proper time to shake their hand?
该什么时候和他们握手？
Design, on the other hand, is proper only if validated by the actual customer.
另一方面，设计，是由实际的客户验证的情况下，才正当的。
Design, on the other hand, is proper only if validated by the actual customer.
另一方面，设计，是由实际的客户验证的情况下，才正当的。
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