Picknometer
比重瓶
🗣️ 情景例句
It needs your time, and it needs your energy.
它需要你的时间 需要你的精力。
His name is John Smith.
他叫约翰、史密斯。
when he knew that he was dying, he made me promise to go on my own.
他知道自己已奄奄一息，于是他要我答应一定单独回故乡一趟。