like a thief in the night鬼鬼祟祟;偷偷摸摸：Our naughty boy often gets into mischief，yesterday he slipped into his grandma’s room like a thief in the night，knowing that he was up to mischief again，we called him back at once.我们的顽皮男孩时常恶作剧，昨天他偷偷摸摸溜进他奶奶屋中，我们知道他又想淘气，立刻把他叫回。 |