Through analysis of the current waveform of the semi-control double three-phase 12-pulse rectifier and the expansion of Fourier series, the main harmonic components of the system were obtained.
通过对半控双三相12脉冲整流器的电流波形分析和傅立叶级数展开，得出系统的主要谐波成分。
2
Semi-protection is a mediocre substitute for version control, while proposals to implement similar features manually have been too complicated for the community to accept.
半保护作为版本控制的替代办法其实不怎么样，而手工进行的提议又太复杂不可接受。
3
Tragically, along the way, the wind blast from a semi knocked our trailers out of control and pushed our truck off a 40 'bridge.