The problem is that although such enzymes exist, they are expensive.
但问题在于这样的混合酶尽管存在，成本却太高。
However, although such statistics may be superficially appealing, this could easily be a random effect.
然而，这些统计数据在表面上看来可能引人入胜，但是它可能仅仅是随机的效应。
Although such an activity entails results, it is not performed in order to achieve them.
尽管此类活动带来了一些结果，但是它的实施并不是为了获得这些结果。
Although such abstractions are not desired all the time, it is appropriate for many cases.
尽管此类抽象并不是一直需要，但它适合于许多情形。
Although such a case is rare, it is by no means unique.
这种情况很罕见，但并非绝无仅有。
Although such a rule might appear to avoid contradictory signals it is not foolproof.
尽管这样的规则能避免产生一些相互矛盾的信号，但不能完全避免。
Although such a rule might appear to avoid contradictory signals it is not foolproof.
尽管这样的规则能避免产生一些相互矛盾的信号，但不能完全避免。
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