本文结果表明：松前在组织培养过程中发生的变异主要为DNA甲基化变异。
The following results were obtained: Theepigenetic changes induced by the tissue culture are mainly DNA methylation alterations.
对于绝大多数跑步者而言，Golaszewski的防守战略——在跑完第一个马拉松前就计划第二个马拉松——的确有些过分。
For many runners, Golaszewski's defense strategy — planning a second marathon before crossing the finish line of the first — is a bit overwhelming.
在我第一次参加马拉松比赛的前一个月，我的一只脚踝受伤了，这意味着两个星期不能跑步，只剩两个星期的训练时间。
A month before my first marathon, one of my ankles was injured and this meant not running for two weeks, leaving me only two weeks to train.
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