threshold ˈθreʃhəʊld
CET6丨IELTS丨TOEFL
基本释义
The threshold of a building or room is the floor in the doorway，or the doorway itself. A threshold is an amount，level，or limit on a scale. When the threshold is reached，something else happens or changes.
n. 门槛，界限，临界点
外刊例句
请在学校大门口等我英文，Global emissions from fossil fuels and cement production in 2019 were 16% higher than in 2009. It will be even harder to limit climate change to less than 2°C above the pre-industrial level，the global threshold from which America’s target for 2050 comes.
2019年全球化石燃料和水泥生产行业的总碳排放量较2009年上升了16%，而美国制定的2050年碳中和目标是将全球气候变化的温升限制在不超过工业化前水平2摄氏度，这将异常困难。
追根溯源
My desk is in the middle of the classroom.3请在校门口等我 Please wait for me at the school gate.
基本的含义是指实体的“门槛，门口”，比如：
She stopped at the threshold of the bedroom.
她在卧室门口停了下来。
Wait for me at the entrance.
正当他要跨进门槛，就听见背后有说话声。
同时，threshold也引申出了“界限、起始点，临界点”等虚拟的含义，指发生或表现出某种反应、现象、结果或状况而必须超过的程度或强度。例如：
My earnings are just above the tax threshold.
我的收入刚刚超过征税起点。
The consensus has clearly shifted in favour of raising the nuclear threshold.
显然大家已普遍开始转向支持提高核武器使用的门槛了。
此外，on the threshold of sth这个习语也很常用，表示“在……的开始、在……的起点、即将开始”，意味着即将进入一个新且重要的时期或发展阶段，比如：
她觉得好像就要开始新生活了。
科学家对于奥密克戎病毒如何运作现在已开始有了进一步的了解。
影视例句
在美剧《摩登家庭》S4E2中，Manny在回应妈妈的调侃时，就用到了今天的单词：
Gloria: Manny doesn&39;re doing. A couple of new hairs under his arm，and now he thinks he knows more than his own mother.
Manny: I know not to embarrass my son as he stands on the threshold of manhood.
Please wait for me at the gate..
-曼尼不相信我们能尽好父母之职，腋窝的毛刚长出几根，他就觉得自己比他妈懂得多了。
英语如下：Wait for me at the door of your classroom or the stairway 在你们教室门口或者楼梯口等我
-我至少懂得不去羞辱儿子青春期的正常发育现象。
