| 释义 |
thresh·old /ˈθreʃhəʊld/ n. | a. | vt.
I n.
1. 门槛；门口
They stepped across the threshold of the hall. 他们跨过大厅的门槛。
She paused on the threshold before ringing the bell. 她在门口站定按门铃。
2. 入门；开端；开始
Already she was on the threshold of womanhood. 她已快成年了。
Scientists are now on the threshold of an important discovery. 科学家们很快就要有一项重大发现。
3. 起始点；〈主英〉(税的)起征点
the threshold at which small businesses have to register for VAT 小企业必须登记缴纳增值税的起征点
the tax threshold for a pensioner 领退休年金者的纳税起点
4. 【生】阈，限，临界
the threshold of audibility 听阈
a visual threshold 视阈
You have a terribly low threshold of shock (irritability). 你太容易吃惊(发怒)。
I've a low pain threshold. 我这人一碰就痛。
5. 【物】阈；阈值
a threshold current 阈电流
6. 【空】跑道入口；跑道头(指进场着陆的一端)
II a.
1. 起始点的
2. 临界的；阈值的
III vt.
用深浅色调改变(图像)
[< OE threscwald; 与 ON threskjöldr, OE threscan to thresh, tread, tramp 有关] |