Methane gas does collect in the mines around here.周围的矿井里的确有沼气聚积。He was grateful for a chance to relax and collect his thoughts.他很庆幸有机会放松放松，整理一下自己的思绪。It's amazing how people collect so much stuff over the years.人们竟然日...
The Congress shall have power to lay and collect taxes, duties, imposts and excises.国会有权规定并征收税金 、 关税 、 捐税和消费税.Methods: To collect midges with bed - curtain , insect net and light trap.方法: 采用帐诱、灯诱和挥网采集蠓.Did you collect th...
Some oscillation of the fuselage had been noticed on early flights.在之前的几次飞行中，就已经察觉到机身有些摇晃。Its oscillation depends on the strength of the gravitational field.它的振动幅度取决于引力场的强度。the oscillation of the compass needle罗盘指针的摆动...