Eigenperiod
特征週期
??? 情景例句
I'd like to help you, but...
我很想幫助你，但是…
Let me go.
讓我走。
Meanwhile, a microphone, which was lowered into the mine two hours ago, has enabled the men to keep in touch with their closest relatives.
與此同時，兩個小時以前放下井去的一只麥克風使井下的人可以與其親屬保持聯系。