Polyadenylic acid(poly(a))
[化] 多腺苷酸; 多聚腺苷酸
??? 情景例句
Sorry, I'm afraid I'm busy tonight.
很抱歉，恐怕我今晚沒空。
I'd like to make an overseas call to Taibei, Taiwan by collect call.
我要打對方付費的電話到臺灣的臺北。
You can't buy them in the shop before eight o'clock.
上午八點之前你在商店里是買不到東西的。