Black bolt
[化] 粗制螺栓
?? 詞語組成解析
black
[bl?k]
adj. 黑（色）的;黑色人種的;黑暗的;不加牛奶的;
n. 黑色;黑人;黑顏料;黑暗;
v. 使變黑;抵制;拒絕;使變黑暗;
bolt
[bolt]
n. 螺栓，螺釘;閃電，雷電;門閂;弩箭;
vt. 篩選;囫圇吞下;（把門、窗等）閂上;突然說出，脫口說出;
vi. （門窗等）閂上，拴住;沖出，跳出;（馬等的）脫韁;囫圇吞下;
adv. 突然地;像箭似地;直立地;
??? 情景例句
I was quite surprised when I read in your letter that you had decided not to finish your studies at the university.
當我在你的信中看到你已決定終止大學學業時感到很是驚訝。
I'm sure I've forgotten something ,but it's too late now.
我肯定我忘記了一些東西，但是它現在是太遲了的。
My friend, Hugh, has always been fat, but things got so bad recently that he decided to go on a diet.
我的朋友休一直很胖，但是近來情況變得越發糟糕，以致他決定節食。