许多减肥者恢复体重是因为他们无法长期坚持严格的饮食计划：在当前的研究中有三分之一的参加者在结束前就退出了。

Many dieters regain weight because they can't stick to rigid eating programs for long: one-third of the participants in the current study dropped out before its conclusion.

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如果舞蹈团演员中有一人体重下降了，如果失去体重的舞蹈演员们没能恢复体重，那么他们就必须把自己的位子让给体重更重的舞蹈演员。

If any of the dancers fall underweight, and if they fail to put the weight back on, they must give up their spot to a heavier dancer.

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在这项研究中，个人和家庭治疗都帮助大多数青少年在一年内恢复到正常体重。

In the study, both individual and family therapy helped most of the teenagers get back to a normal weight within a year.

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