Picknometer,pycnometer
[化] 比重瓶; 比重管
🗣️ 情景例句
to serve the senior citizens
为Riverdale的老年人
You never know.
天晓得。
A temporary rudder was made on board from spare planks and it was fitted with great difficulty.
船员用备用的木板在船上赶制了一只应急用的舵，并克服重重困难将舵安装就位，