Countersunk bolt
[化] 埋头螺栓
🧩 词语组成解析
[化] 埋头孔
bolt
[bolt]
n. 螺栓，螺钉;闪电，雷电;门闩;弩箭;
vt. 筛选;囫囵吞下;（把门、窗等）闩上;突然说出，脱口说出;
vi. （门窗等）闩上，拴住;冲出，跳出;（马等的）脱缰;囫囵吞下;
adv. 突然地;像箭似地;直立地;
🗣️ 情景例句
Paper or plastic?
现金还是信用卡？
As the wind blows, you must set your sail.
趁风启帆。
And then quickly and quietly we did just that.
于是，我们就迅速而且悄悄地干了起来。