通地泄露电路断电器: early leakage circuit breakerearth leakage circuit breaker
火箭: [航空] rocket; fire arrow; bird 短语和例子发射火箭 fire a rocket; 穿甲火箭 armour-piercing rocket; 单级火箭 one-stage rocket; 弹道火箭 ballistic rocket; 多级火箭 multi-step rocket; 二级火箭 two-stage rocket; 高超音速火箭 hype
但: Ⅰ副词(只) only; just; merely 短语和例子不求有功, 但求无过 do not hope to distinguish oneself, but only not to make mistakes; 但说无妨 just speak out what is on your mind; 在辽阔的原野上, 但见麦浪随风起伏。 on the vast fields
