有时他们也认为终止友谊会更轻松，但是他们绑系得太紧，要那样做很难。
难以(做)..., 很难(做)...
it is difficult to do
暂无补充释义。
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difficult
difficult
difficult
difficult
heavy head that is difficult to lift
intestinal dryness with difficult defecation
difficult sluggish speech
difficult question