COCKROACH中文(简体)翻译：剑桥词典

“每日一词”

rock-a-bye

UK

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/ˈrɒk.əˌbaɪ/

US

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/ˈrɑːk.əˌbaɪ/

to rock a baby (= to move it backwards and forwards or from side to side in a regular way) to help it to sleep

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