The surface interval should be spent without exercise.
水面停留间隔期间不应该从事任何运动。
Interval training can help you during the transition period between one exercise program and another.
间歇训练可以帮助你从一种训练程序过渡到另一种。
Interval training can help you during the transition period between one exercise program and another.
间歇训练可以帮助你从一种训练程序过渡到另一种。
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