所以，让我们承诺在九月相会的英文

so, let us make a pledge to meet in september

• 所以:    so; therefore; as ...
• 让:    give way; give gro ...
• 我们:    we
• 承诺:    promise to underta ...
• 在:    exist; be living
• 九月:    September the nint ...
• 相会:    meet tryst