thresholdthresh•old /'θreʃhəʊld,'θreʃəʊld/

n C

1. 门槛；门口

• cross the threshold 跨过门槛

2. 开端；起点

• at the threshold of a new era in science 科学领域新时代的开端

• He was on the threshold of a brilliant career. 他的事业正开始飞黄腾达。

3. 【生】 阈

• the threshold of audibility 听阈

• have a high pain threshold 有很高的痛觉阈