不知所措的英语be at a loss.
be at a loss （what to do）：不知所措。
be in a state of confusion：处于混乱状态。
be at one's wits'end：不知所措。
lose one's bearings：迷失方向。
基本解释重点词汇：
be at正在做；打算做。
loss遗失；丧失；损失；经济损失；失去所爱之人（或宝贵事物）的。痛苦；痛失；死后被人怀念的人；失去后使人难以忘怀的物品。
what to do要做什么；去做什么；做什么。
a state一国；一个国家；状态。
confusion不确定；疑惑；困惑；糊涂；迷茫；混乱；混淆；慌乱；紊乱；杂乱。
at one一致地；一点整；（at one time）曾经一度。
lose失去；丢失；输掉；未赢得（游戏；竞赛）；入不敷出；亏损；迷路；专注于；使…失去；（因死亡、断交）痛失（亲属）。
bearings轴承；举止；方向；风度；（bearing的复数）。
相关例句：
1、去异国他乡上学似乎有些让我不知所措。
And studying in a foreign country seems a bit overwhelming.
2、他们感到不知所措，无法处理生活中的问题。
They feel too overwhelmed to deal with life's problems.
3、像这样的陈述会让你听起来漫无目的，不知所措。
Statements like these will make you sound aimless and lost.
4、正当我不知所措时，好运降临了。
When I was at a loss, luck intervened.
5、我觉得如同在五里雾中，不知所措。
I felt as if I had been caught in a heavy fog and was at a loss what to do next.
6、事情来得如此突兀，他简直不知所措了。
It all happened so suddenly that he had no idea what to do. / The unexpected event caught him unawares.
7、她脸皮薄。别人跟她开玩笑的时候，她不知所措。
She is very shy. When others make fun of her, she does not know how to act up.
8、下院的猛烈抨击使首相不知所措。
The Prime Minister was reeling from a savaging inflicted in the Commons.
9、供选择的节日很多，让人不知所措。
bewildering]there is a bewildering array of holidays to choose from.
10、一位似乎已对自己的处境不知所措的老人。
An elderly person who seems to be losing his grip.