不知他有什么事老是心神不定的样子: i don't know what is on his mind he always looks restless
疑虑: misgivings; doubt 短语和例子消除心中的疑虑 clear one's mind of doubt; free sb. from doubts and misgivings; 一切疑虑现在都烟消云散了。 all doubts have now dissipated. 她对是否再借钱给他不无疑虑。 she has her doubts about loaning
