Knife edge
[机] 刀口
🧩 词语组成解析
knife
[naɪf]
n. 刀;匕首;刃部;手术刀;
vt. 切割，刺;伤害;
vi. 劈开;划过;
edge
[ɛdʒ]
n. 边;优势;（悬崖、峭壁的）边缘，端;锋利，尖锐;
vt. 在…上加边界;使渐进;给（刀刃）磨边，使锋利;修整;
vi. 慢慢向前移动，侧身移动;
🗣️ 情景例句
For when we build our campfire.
用来生营火的。
Do you want me to check the tires?
要检查轮胎吗？
It was upon this principle that the first instruments were made,
据这一原理，制造出了最初的地震仪器，