Ul
abbr. （美）保险商实验所（Underwriters' Laboratories）
🗣️ 情景例句
Chairman Mao said it is necessary to drill as much as possible.
毛主席说，反复操练是非常必要的。
He was at a loss for words.
他不知道该说什么好。
She goes to work every day except Sunday.
除星期天外，他每天去上班。