小测验：选择正确的单词
ticktack ['tiktæk]
基本释义
英英解释
- system of signalling by hand signs used by bookmakers at racetracks
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- make a sound like a clock or a timer
[同]
beat, tick, ticktack, ticktock
[例]
- the clocks were ticking
- the grandfather clock beat midnight
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，可以收听真人发音