Chinese translation of 'penfriend'

• significant
• significant advantage
• significant amount
• significant benefit
• significant challenge
• significant change
• significant contribution
• to let sleeping dogs lie
• to let slip that ...
• to let someone know
• to-let-someone-know
• to let someone off the hook
• to let standards/things slide
• to let sth happen
• to let the cat out of the bag
• to let the matter rest
• to let the side down
• toletum
• to let your hair down
• to level a gun at sb
• to level an accusation/a criticism at or against sb
• to level the score
• to level with sb
• to lever o.s. up
• to lever sth open