With such a long interval, it is difficult to determine the age of this fossil.
时间隔得这么久了，很难确定这化石的年代。
But it is difficult to determine what gentile name was borne by married women.
但是，确定已婚妇女的血族名称却成了一种困难。
It is difficult to determine from an interview whether someone is type a or not.
面试很难区分出某个人到底属于A类还是B类。
It is difficult to determine actual time allotment for individual teaching session.
对于每次授课的时间分配上是很难决定的。
It is very difficult to determine the cause of a problem that only occurs sometimes.
只有偶尔会发生的问题是很难确定问题的起因的。
It is often difficult to determine the meaning of a word without a context.
脱离上下文很难确定一个词的意思。
It is difficult to reliably determine blade's vibration mode shape with conventional measurement method.
传统的测量方法难以可靠地确定叶片的振型。
It is difficult to reliably determine blade's vibration mode shape with conventional measurement method.
传统的测量方法难以可靠地确定叶片的振型。
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