Isochronograf
等时仪
🗣️ 情景例句
Oh, Richard! That's wonderful, but--
噢， Richard ，那真是太好了， 可是……
Mother begins baking cookies two weeks before Christmas.
自圣诞节的两周以前，母亲就开始做小甜饼了。
The spheres had been magnetized and attracted or repelled each other all the time.
金属球经过磁化，互相之间不停地相互吸引或相互排斥。