Tkn
[医][=total kjeldahl nitrogen]总克氏氮
🗣️ 情景例句
Collecting matchsticks was fun, until that fateful day one of them caught alight.
收集火柴是一种乐趣，除非一天其中一根火柴不幸燃烧起来。
He yanked out my ladder.
他使劲地拉了我的梯子。
It was j-223,just double the second item.
j-223第二项的订量要加倍。