The trade-off is that connecting to an in-memory database will take little more unit test time, but there will be less code and development effort.
虽然连接到内存数据库会多花点时间，但代码相对要少很多，开发代价也小。
2
Take-off and unit pricing is completed before bid day.
拿离开，单元定价在出价日前是已完成的。
3
As the control unit of radio transmitter, micro-controller take charge of monitor machine state, dispose malfunction, and turn on or shut off the machine on schedule.