be Greek to one

... bite the bullet 迎接挑战，克服困难 be Greek to one 高深莫测 bite off more than one can chew 做超出自己能力的事情 ...

中国成语的英文说法 -... ... 一诺千金 as good as one's word 一窍不通 be Greek to one 一蹶不振 meet one's Waterloo ...

... 105. a white lie 善意的谎言 106. be Greek to one 一点也不明白 107. bury one’s head in the sand 逃避现实；自欺欺人 ...