复数：precontracts 过去分词：precontracted 现在分词：precontracting
1.预约,先约;〈古〉(具有法律效力的)订婚,婚约
1.预约;〈古〉订婚(约)
2.预先规定;〈古〉同...预订婚约
1.a contract made in advance to prevent a subsequent contract, especially an arranged marriage
1.to make a contract or enter into an agreement in advance
2.in former times, to pledge somebody to marriage by an earlier agreement, or be pledged in this way
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