Protocatechualdehyde
[化] 原儿茶醛
🗣️ 情景例句
There is no hope of success.
没有成功的希望。
Time past never returns, amoment lost, lost for ever.
过去的时间决不返回，浪费一点，永远消失。
The American president who fought for the freedom of slaves in the USA.
为美国奴隶的自由而战的美国总统。