她用镐和平锹挖地基。She dug the foundation with a pick and shovel.碎砖石可以用来铺路基和庭院地基。Brick rubble is useful as the base for paths and patios.如果地基不牢，房子将会倒塌。If the foundations are flawed the house will come tumbling down....
使磁通以极小的阻力在铁心中流通.The magnetic flux can flow inside the core with extreme low reluctance.缠绕着线圈的铁心叫做电枢.The iron with the wound coils on it is called an armature.电流互感器铁心 ( 如果配备 ) 单独接地.Iron core of CT ( it is supplied ) shoul...
The walls have been horribly vandalized with spray paint.墙上被人用喷漆涂得乱七八糟。The walls had been horribly vandalized with spray paint.墙壁被用喷漆喷得一塌糊涂。About 1,000 rioters vandalized buildings and looted stores.大约1,000名暴徒一路捣毁建筑，抢劫商店...
Use a weatherproof rucksack to carry your camera and lenses around in.用防风雨的帆布背包装照相机和镜头。She delved into her rucksack and pulled out a folder.她在背包里翻找一番后拿出了一个文件夹。He had a small green rucksack slung over one shoulder.他单肩挎着一个...