目前铅和甲基叔丁基醚(MTBE)等添加剂被叫停，取而代之的是在汽油中添加少量酒精，这样提升辛烷水平能防止负载中引擎产生爆震。
With lead and MTBE additives now phased out, spiking petrol with a small amount of ethanol raises its octane level enough to prevent the engine from "knocking" under load.
在阐述震击器的结构设计和工作原理之后，着重介绍了震击器的规格系列、参数、操作规程、维修保养和地面试验等使用说明。
After an introduction to the design features of the jar, the specifications, parameters, operating rules, maintenance and surface test of the jar are listed and expounded.
在空间上，压磁、感磁等机制引起的震磁效应主要分布在震中附近的有限区域内，震级越大，展布范围也越大。
Spatially , seismomagnetic effect caused by piezomagnetism and induced magnetism. is mainly distributed in the limited areas near epicenters , the bigger of the magnitude , the wider of the range.
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