Oleorefractometer
油折射计
🗣️ 情景例句
It hung over Susan's crib.
Susan的小床也曾有过。
A disease known is half cured.
病情确诊断，治病好一半。
While the men had been working inside the ship, the air-line had been giving off oxygen.
当工人们的在船舱里干活时，供气管一直在排放氧气。