Ergosterine
麦角固醇
🗣️ 情景例句
and he's very unhappy about not working.
他对没有工作感到怏怏不乐。
The secret of success is constancy of purpose.
成功的秘诀是目标坚定。
An enterprise has to incur certain costs and expenses in order to stay in business.
一个企业为了继续经营，不得不支出一定的费用和开销。