Even if service is substandard still leave at least some tip.
即使服务是不合格的,也要记得给一些小费。
They stay put in areas where housing is substandard, safe water and sanitation are scarce, environments are filthy, and disease-carrying insects and animals are abundant.
它们滞留在住房条件差、安全用水和卫生设施稀缺、环境肮脏以及带病昆虫和动物大量繁衍的地方。
She has written good essay before, but this one is substandard.
她以前写的文章不错,但这一篇却不怎么样。
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