I'm seeing a patient ─ please wait outside.
我正在给病人看病。请在外面等候。
Please wait your turn.
请等着轮到你。
Please wait a moment.; Just a moment, please.
请稍等一会儿。
Please wait on, will you? I'm just coming!
请稍等片刻好吗？我就来！
Please wait for a moment.
请等一会儿。
Please wait a moment.
请稍候一会儿。
Please wait for me at the gate.
请在大门口等我。