proven difficult翻译

proven difficult的基本解释

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证明困难:表示某事很难做到或实现。

例句

In the past this process of transition has often proven difficult.在过去,这种转变过程常证明是艰难的。《柯林斯英汉双解大词典》
Reducing demand has proven difficult.事实证明,降低需求非常困难。
But finding nascent massive stars has proven difficult.但找到新生的巨型恒星很不容易。
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