习惯用语be (lie)under an obligation to1.对...有义务; 受过...的恩惠lay an obligation upon1.使负债务lay sb. under an obligation1.施恩给某人, 使某人承担义务put one under an obligation1.施恩惠给某人repay an obligation1.报恩under anobligation(to do)1.有义务,一定要特殊用法alternative obligation1.选择债务contrac-tual obligation1.契约责任conventional obligations1.契约义务demand obligation1.随时支付的债务fund obligation1.资金负担indivisible obligation1.不可分割债务joint and several obligation1.连带债务legal obligation1.法律义务(如合同契约等)liquidated obligation1.已清偿的债务mutual obligations1.相互债务责任non-interest-bearingobligation1.未付利息债务perfect obligation1.完全债务performance obligation1.履行义务的债务purchase-money obligation1.置产债务surety obligation1.保证债务; 索偿债务unliquidated obligation1.未清偿债务