这种基因有两种变体，其中一种由于缺失了一部分而不能正常工作。
This gene comes in two varieties, one of which has a part missing and therefore does not work properly.
要考虑两种事务失败：第一种是所有服务都能够参与事务时，而第二种是包括一个或多个不能参与事务的服务。
There are two kinds of transaction failure to consider: the first is when all of the services are transaction-capable, and the second is when one or more non-transaction-capable services are involved.
预备试验规模太小而不能在统计学方面使得这个重要的结果成立，而且两种人的混合也使试验更加复杂了。
The pilot study was too small for statistically significant conclusions to be drawn from it and was complicated by the combining of two different populations.
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