Polyadenylic acid
多（聚）腺苷酸
🧩 词语组成解析
🗣️ 情景例句
Did you look at them?
你看过了吗？
She finally began to get angry when Paul didn't arrive.
当保罗没有到达时，她终于开始生气了。
All gun-ports were open and the muzzles peeped wickedly from them.
船上的炮眼都开着，炮口虎视眈眈地向外窥视着。