Microthrombus
微血栓
🗣️ 情景例句
It was so nice to be out in the country.
出去置身乡下真是太好了。
The darkest hour is that before the dawn.
黎明前是最黑暗的时刻。
Oil rigs have to be repaired frequently and divers,who often have to work in darkness a hundred feet under water,
钻井平台需要经常修理，潜水员常常要在水面100英尺以下摸黑工作，