Nitroamine
硝胺
🗣️ 情景例句
Loosen up! it's not worth getting upset about.
放松点儿！ 不值得为这件事苦恼。
That cat judged the distance before he leapt across the ditch.
猫在越过沟渠以前便判断好其距离了。
You are a walking dictionary.
你是活字典。