non-arcingsparkless不发火: misfire; misfiring; fail to ...花: flower; blossom; bloom的: 4次方是 The fourth power of 2 i ...发火花的触点: sparking contact爆发火花的物质: ignescent下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:不发火花的，即可在微信中查询翻译
