Ammonia clock
氨钟
🧩 词语组成解析
ammonia
[ə'məunjə]
n. 氨;氨水;氨气;
clock
[klɑk]
n. 钟，时钟;计时器;秒表;仪表;
vt. 记录（时间或速度）;测…的速度;
vi. 打卡;记下时间;
🗣️ 情景例句
What classes are mandatory for your major?
你的专业什么课是必修的？
Things done cannot be undone.
木已成舟。
Now that a tunnel ahs been built through the mountains, the Pass is less dangerous,
如今由于山里开挖了隧道，翻越山口已不那么危险了。