The purpose of the registration fee is to cover cost of conference facility and speakers' travel cost.

登记的目的是要支付成本费的会议设施和讲员的旅行费用。

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The purpose of the registration fee is to cover cost of conference facility and speakers' travel cost.

登记的目的是要支付成本费的会议设施和讲员的旅行费用。

youdao