Those sites are also more difficult to set up and maintain, which unfortunately often translates into less stable sites.
这些站点也比较难于设置和维护，遗憾的是，这通常会导致站点不大稳定。
The bigger the circle of semantic interoperability is, the more reusable the result will be in the long run, but also more difficult to coordinate and reach consensus.
语义互操作性的范围越大，其成果的长远可重用性会越高，但是也更加难以协调和达成一致。
Medicines produced in liquid form are more expensive than tablets or powders and are also more difficult to store, package, and transport, due to their bulk, weight and need for refrigeration.
液体药物比片剂或粉剂更加昂贵，而且因其体积、重量和制冷需要，也更加难以储存、包装和运输。
But to me, the Chinese attitude speaks of something deeper and also more difficult to put into words.
但在我看来，中国人的这种态度还代表了一种更深层次的原因，而且更不容易说清楚。
On account of the greater nearness in age this second advance was infinitely more important but also more difficult than the first.
这一进步，由于当事者的年龄比较接近，所以比第一个进步重要得多，但也困难得多。
On account of the greater nearness in age this second advance was infinitely more important but also more difficult than the first.
这一进步，由于当事者的年龄比较接近，所以比第一个进步重要得多，但也困难得多。
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