| 单词 | sneak up (on sb/sth) |
| 释义 | ● ˌsneak ˈup (on sb /sth )to move towards sb very quietly so that they do not see or hear you until you reach them 偷偷走近◆ He sneaked up on his sister and shouted 'Boo !' . 他偷偷溜到妹妹身边，然后大喊一声 “嘿！”See also sneak |
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