... If Properly Used 如果正确利用 When Properly Used 当正确地使用 Disinfectants must be properly used 必须合理使用消毒剂 ...
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When Used Properly 如果使用得当
Vibrato is a very expressive technique, and can say a thousand different things when properly used (or misused).
颤音是一个很富有表现力的技巧,可以说在适当的使用(或滥用)时能有上千种不同的效果。
Centipedes, snakes and scorpions are venomous, but, when properly used, they cure disease by combating poison with poison, don't they?
蜈蚣蛇蝎是毒虫,但用得其当不也能以毒攻毒地治病吗?
A lot of progress has been made in the USA by showing people that these medications do not kill patients and, when properly used near the end of life, they do not cause addiction.
美国在这方面取得了很大进展,人们看到这些药物治疗不会致患者于死地,在临近生命的尽头时使用得当,并不会使人成瘾。
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