三个月为一个疗程。

Three months for a course of treatment.

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每一名参与者在两到三个月的疗程中使用该系统7到10次。

Each participant used the system between seven and 10 times over the course of two to three months.

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每一名参与者在两到三个月的疗程中使用该系统7到10次。

Each participant used the system between seven and 10 times over the course of two to three months.

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