very alert;extremely vigilant;keen ears;quick-eared ;
Keep your ear to the ground and take nothing for granted.
要耳听八方和不要做任何保证.
There's a built-in stereo microphone for use with your video, plus a mike jack.
内 置 的立体声麦克风和扩音器,能帮你在摄制影像的时候, 耳听八方.
Peter'll know; he always keeps an ear to the ground.
彼得会知道的, 他耳听八方.
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