Tcnb
[建] 四氧硝基苯
🗣️ 情景例句
Don't count your chickens before they hatch.
小鸡孵出之后再算数。
Perseverance is failing nineteen times and succeeding the twentieth.
十九次失败，到第二十次获得成功，这就叫坚持。
What kind of price did you have in mind?
你说多少呢？