clutch
吓呆了（指精神上的）

例句：
For a second there I clutched, but then I forgot there were hundreds of eyes on me and sang my song as if I were at home singing to my family.
刚开始的时候我愣住了，但过了一会儿，我忘记了有几百双眼睛在注视着我，我只管唱我的歌，仿佛在家中给家里的人唱歌似的。

at sixes and sevens
拿不定主意，糊涂

例句：
I'm really at sixes and sevens over taking this new job.
是否要这份新工作，我真拿不准。

I'm glad to meet you.
很高兴认识你。

初次见面的寒暄语，也可以说：
Pleased to meet you!
Nice to see you!