She could only raise her hand in a gesture of benediction.
她只能举手表示祝福祷告。
《柯林斯英汉双解大词典》
2
Simply raise your hand, and a taxi appears in no time.
只要举起你的手，出租车就会立刻出现。
3
If at any point, you've got something you want to ask about or some two bits you want to add, raise your hand and wiggle it around to make sure I see you.