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68            jeopardy             ·çÏÕ£»Î£ÏÕ£»Î£ÄÑ        Jeopardize Î£º¦
69            jet lag                  Ê±²î 
70            jot down             ÂÔ¼ÇÏ£»´Ò´Ò¼ÇÏ 
71            know-how          ¼¼ÄÜ£»öλÔÓéÀֵǼÈë¿ÚÏÂÔØ֪ʶ£»ÇÏÃÅ 
72            laundromat        ×ÔÖúÏ´ÒµêLaundry + automat(×Ô¶¯ÊÛ»õ»ú)
73            lay off                 £¨ÔÝʱ£©½â¹Í 
74            leading edge      ¾ÓÁìÏÈÓÅÊƵĠ
75            ledger                 ×ÜÕÊ£»·ÖÀàÕÊ                 Ledge ±Ú¼Ü
76            leftovers             Ê£·¹Ê£²Ë 
77            life vest               ¾ÈÉúÒ 
78            liquor                  ÁҾƣ¨ÈçÍþÊ¿¼É£©           Liquid ÒºÌå
79            loan shark          ·Å¸ßÀû´ûÕß 
80            malfunction        ¹ÊÕÏ£»·¢Éú¹ÊÕÏ£¬»úÄÜʧ³£  Mal- ±íʾ»µµÄ£¬´íÎóµÄÒâ˼