【电】 自由振荡

文摘:本文用插值摄动法及改进的L-P法相结合的方法求解了一类有阻尼的强非线性自由振动问题，得到了一级近似解。

free the gate

lubricant, free of mineral oil

the low-tax, tariff-free zone; bonded area; tax-protected zone

ambiguity in context-free grammar【计】

pulse-free chromatographic pump

context-free phrase structure rule【计】

six bowels fulfill their purposes when there is free flow

Free Passage