The big disadvantage is that there are often limits on what you can sell with this approach.
最大的缺点就是对用这种方法销售的产品有些限制。
The big disadvantage of this ad hoc approach is that it can be extremely slow, and it will be expensive if you do a lot of searching.
这种特别方法的 最大缺点在于速度特别慢，而且如果进行许多次搜索的话，成本很高。
The big disadvantage of free-standing turbines is that they are less efficient than turbines in DAMS at turning the kinetic energy of moving water into electricity.
自立式涡轮机最大的缺点是在将水能转换成电能方面，它们没有大坝中的涡轮机的效率高。
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