It can be difficult to ascertain the facts.
可能难以查明事实真相。
It's difficult to ascertain the coal deposits.
煤储量很难探明。
It is difficult to ascertain what happened here.
这里发生的事情很难查明。
This may be difficult to ascertain, but it's worth a shot.
也许这是很难确定的事情，但是值得一试。
This may be difficult to ascertain, but it's worth a shot.
也许很难说的准，但是值得一试。
This may be difficult to ascertain, but it's worth a shot.
也许很难说的准，但是值得一试。
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