ascertain [ˌæsəˈteɪn]

以下由轻松背单词网站提供

vt.发现，确定，查明，弄清

to discover ; to make certain

It's difficult to ascertain the coal deposits. 煤储量很难探明。
We must ascertain the responsibility in light of different situtations. 我们必须根据不同情况判定责任。