When the mini-computer receives the message, the buzzer goes off and Toby comes running over and sits beneath a tube under his feeder contraption. Then the motor comes to life and pulls open a trap door which releases a serving of food.
一旦微处理器接收到信息,蜂鸣器就会嗡嗡作响,托比听到声音后奔过来,坐在喂食器装置下方的管道边等着。发动机开始工作,狗粮储存仓下面的活动门就会打开。
when the circuitry takes the form of two or three wires running in parallel, the magnetic field forms a tubelike trap along which the atoms can move freely.
当线路中有二或三条导线平行排列时,磁场会形成管状阱,原子可在其中自由移动。
The caegories in shooting competition include rifle , pistol , running game target, trap and skeet.
步枪项目的射击姿势有三种.
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