Calibrating knob
[机] 校准钮
🧩 词语组成解析
v. 校准( calibrate的现在分词 ); 使标准化; 使合标准; 测量（枪的）口径
knob
[nɑb]
n. 球形把手;（收音机等的）旋钮;小块;疙瘩;
v. 鼓起;使有球形突出物;给（门等）装球形把手;
🗣️ 情景例句
When you feel your life is threatened, just dial 999 to get help.
当你的生命受到威胁的时候，拨打 999 求救。
A chain is no stronger than its weakest link.
链条的坚固程度取决于它最薄弱的环节。
You must keep it a secret. You mustn't tell anybody else.
你必须保密，谁都不能讲。