1、
Parents are humiliated if their children behave badly when guests are present.
子女在客人面前举止失当,父母也失体面.
《简明英汉词典》
2、
His actions didn't faze me in the least; I expected him to behave badly.
他的行为一点也没有吓著我, 我早就料到他会有一番恶劣表现.
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3、
