Indentured servant
n. 契约佣工
🧩 词语组成解析
v. <史>以契约束缚（学徒）( indenture的过去式和过去分词 )
🗣️ 情景例句
Oh, beautiful as ever, Lillian.
噢 ，还像以前一样漂亮， Lillian。
Don't you care about this country's future?
难道你不会国家首任担忧吗？
and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.
测出回声间隔的时间，便可算出该处海洋的深度。