You should make an appointment in advance.
你应该提前预约。
People can telephone to make an appointment in advance or head for a doctor directly.
人们可以打电话提前预约，也可以直接去找医生看病。
Chinese teachers' lesions do not limit the number and level, just need to make an appointment in advance.
每天的中教课不限制人数和级别，只需要提前做好预约即可。
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