Oleorefractometer
油折射计
🗣️ 情景例句
The annual school sports meet is held in March.
每年一次校运会在三月份举行。
Respect yourself, or no one else will respect you.
君须自敬，人乃敬之。
That's OK.We really need the material.
没关系，我们急着要这些原料。