When people raise their glasses at a festive gathering, they mean to toast someone or something. 比方说，为我们两个国家的友谊干杯！

Raise your glass means to "cheers"

It means "to drink a toast to someone." It can also be a "command": first person plural: "Let us all raise our glasses to Lizzie for being such a good student." Or: second person singular or plural "[You] Raise your class to Lizzie..."

Meaning "Cheers". Several examples: Prepare to raise your glass to some cheering news! I'd ask you to raise your glass and join me in a toast to the health of all our friends here.