Pipeclay
（造烟管或皮革用的）白黏土, <喻>（军队对服装等的）严格要求
📖 牛津释义
pipeclay
n [U] fine white clay used (esp formerly) for making tobacco pipes and for whitening leather, etc 白陶土（尤於旧时用以制烟斗、 使皮革增白等）.
🗣️ 情景例句
I'm afraid not. We don't generally accept a letter of credit.
恐怕不行，我们一般不采用信用卡。
The student felt very shy as he stood in front of the class.
那个学生站在大家的跟前时，感到非常难为情。
That's good to know.
幸好知道了这件事。