機不可失意思解釋◎ 機不可失 jībùkěshī[Don't let slip an opportunity;A golden opportunity is not to be missed;Now or n

智者千慮，必有一失意思解釋◎ 智者千慮，必有一失 zhìzhě qiān lǜ,bì yǒu yī shī[even the wise are not always free from error

得不償失意思解釋◎ 得不償失 débùchángshī[submarginal;the loss outweighs the gain;gain does not equal

悵然若失意思解釋　失意而悶悶不樂，好像丟失了什么似的。形容傷感迷惘的情狀。悵然若失國語詞典解釋神志迷惘，若有所失的樣子。《聊齋志異．卷七．牛成章》：「主人視其里居、姓氏，似有所動，問所從來。忠泣訴父名，主人悵然若失。」也作「悵然自失」。悵然

患得患失意思解釋◎ 患得患失 huàndé-huànshī[worry about personal gains and losses] 憂慮爵位的得失。后引申為一味擔心得失