Pentacetate
五乙酸盐
🗣️ 情景例句
I'm a photographer.
我是摄影师。
He laughs best who laughs last.
谁笑在最后，谁笑得最好。
The big clock which used to strike the hours day and night was damaged many years ago and has been silent ever since.
教堂的钟很大，以前不分昼夜打点报时，但很多年前遭到毁坏，从此便无声无息了。