改进题：The contract stipulates that four month's notice be given by letter of the intention to terminate it.

译文：合同规定，以终止合同的书信形式提前4个月给予通知。

改进题：The contract stipulates that four month's notice be given by letter of the intention to terminate it.

译文：合同规定，以终止合同的书信形式提前4个月给予通知。

改进的译文：合同规定，如想中止合同须提前4个月给予书面通知。