费尽心机[fèi jìn xīn jī]
词典tax one's ingenuity：费尽心机。
词典beat [ransack] one's brains about [with] ...
词典cudgel [rack] one's brains [wits]
词典exhaust all mental efforts：费尽心机。
费尽心机[fèi jìn xīn jī]
tax one's ingenuity; beat [ransack] one's brains about [with] ...; cudgel [rack] one's brains [wits]; exhaust all mental efforts; exhaust one's abilities; rack one's brains (in scheming); take great pains to ...