His chairs can swivel, but they can't move up or down.他的椅子能旋转，但是不能升降。She returned to the swivel chair behind her desk.她回到桌子后面的转椅上.He leaned back in the swivel chair and locked his fingers behind his head.他仰靠在转椅上，十指交...
提出了一种非线性自适应最优励磁控制器.The paper presents a novel nonlinear adaptive optimal excitation controller.补偿器的输出信号作用在本地发电机励磁系统.The compensator is added in excitation system of the generator.交流励磁是一种好解法对这个问题.AC excitation is a good s...
A toddler requires close supervision and firm control at all times.刚学步的孩子时刻需要寸步不离的照看，并要牢牢看紧。a toddler's first few halting steps学步幼儿的蹒跚脚步The toddler pointed to the toy he wanted.蹒跚学步的孩子指着想要的玩具....