Upper alarm limit
[化] 上警告限
🧩 词语组成解析
upper
['ʌpə]
adj. 地位较高的;上面的;内地的;地表层的;
n. 鞋帮，靴面;兴奋剂;令人兴奋的经历;
🗣️ 情景例句
Hi, Anita, long time no see.
嗨，安妮塔，好久不见了。
He has been to America.
他曾去过美国。[表示曾经有过的经验]
He felt free to talk about his failures or his difficulties.
他可以随便谈论自己的失败或困境。