Bhcs
abbr. 圓頭帽螺釘；井眼補償聲波測井
??? 情景例句
He started with them almost forty years ago.
他在那里做了快四十年了。
Just for argument's sake, suppose we disagree.
為了討論各種情形，讓我們假設我方不同意時的處理方法。
In it there was a boatman fast asleep.
船上有一船夫在呼呼大睡。