Photoradiometer
[医] X线[辐射]量计
🗣️ 情景例句
Well, make yourselves comfortable.
噢， 请大家自便。
His opening remarks were serious.
他的开场白说得很严肃。
It is better to ask for help at the beginning rather than to wait until a busy period when everyone is rushed off their feet.
最好在开始工作时就请人帮忙，而不是等到大学都忙得不可开交的时候。