let on
US
UK let on vi phrasal: informal (reveal or indicate) (非正式用语)
SC 泄露，透露 xiè lù ，tòu lù
TC 透露
TC 透露
SC 表露，流露 biǎo lù，liú lù
TC 流露
TC 流露
John tried his best not to let on about Jane's surprise party. I was upset, but did not let on.
约翰尽最大努力，保密给简举办的惊喜派对。
我很沮丧，不过并没有表露出来。
let [sb] in on [sth], let [sb] into [sth] v expr: (share secret)
SC 告诉某人某事，向某人透露某事