• 1. Activity start: 活动开始
• 2. earliest activity start time: 活动最早开始时间
• 3. latest allowable activity start time: 活动容许最迟开始时间

更多释义

• 1.When the speeches start, all activity must stop in tile restaurant, so that the three people giving them can be heard.
  发言开始后，餐厅内其余所有活动都要停下，这样大家才能听见那三位演讲者说话。
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• 2.Ten minutes of activity per day is a good start, says Marcus Jackovitz, DPT, a physical therapist at the University of Miami Hospital.
  迈阿密大学附属医院的物理治疗博士、理疗师马库斯·杰克维兹说，每天运动十分钟是一个好的开始。
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• 3.If you would like to start trampolining, you may first need to ask a doctor to make sure it's a safe activity for you.
  如果你想开始玩蹦床，你可能首先需要请医生确保这对你是一项安全的活动。
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