Foil wrapping paper is beautiful but difficult to use.
锡箔包装纸好看却难用。
This is why dentures are comparatively easy to wear, but difficult to use.
这也就是义齿较易戴住，却难于应用的原因。
But they only use them for soup or when the food is difficult to pick up.
但他们只是用它们来喝汤或当食物很难拿起时。
But it is very difficult to use a formula in working out a maths problem.
但用公式解决某个数学问题却很难。
Well, I want to learn all at once , but it really difficult to use Korean.
很好，我想要同时学会，仅它真正地难使用韩国语。
Early to write "Titanic" opinion, but this feeling is difficult to use language to express.
很早就想写写《泰坦尼克号》的观后感，只是这样的感觉难以用语言表达。
But they can be difficult to use, expensive to buy and often kill live samples.
但他们可能很难使用，因为太贵买不起，经常会杀死活体样本。
Typically, the hierarchical file structure is more space-efficient but more difficult to use.
层级式档案架构具备较节省空间的特性，但较难使用。
Typically, the hierarchical file structure is more space-efficient but more difficult to use.
层级式档案架构具备较节省空间的特性，但较难使用。
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