这个问题是偶然因素造成的，不会波及其它批次。
This problem, which is caused by accident, shall not affect other batches of products.
脐带异常中脐带真结节、扭转均属偶然因素，难以预防。
True knot and torsion of cord are cause by occasional factors and difficult to prevent.
但即使是舒宾本人也坦承：偶然因素在成功的搜寻中起到了极大的作用。
But even he admits that serendipity plays a big part in a successful hunt.
野生大熊猫的生活也在改善，其中有偶然的因素。
Life for wild pandas has been improving too, partly by accident.
这一现象的产生不是偶然的，而是多重因素作用的结果。
This phenomenon is not an accident, but a result of multiple factors.
这世上有太多偶然的契机，我们却无从将这些因素分级。
There are simply too many random factors; we'll never get to grade them.
在事情完成之前都留有偶然的因素。
在事情完成之前都留有偶然的因素。
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