打击 strike; attack; crack down; hit; trip; swash; collision; verberation; blow 打击刑事犯罪 crack down on crime; 沉重的打击 a heavy blow; 打击经济领域的严重犯罪活动 struggle against serious crimes in the economic field; crack down on serious criminal activities in the economic field; 打击投机倒把活动 crack down on speculation and profiteering; 打击歪风 take strong measures against unhealthy tendencies; combat unhealthy tendencies
棒击法 stick striking; striking with mulberry twigs stick
It introduces the methods of making stone tools , including direct and indirect freehand flaking , anvil and bi - polar techniques . the usage of the tools is also mentioned 介绍石器的用途及制造石器的方法,如直接打击法、摔击法、两极法和间接打击法。
Soil quality - gas chromatographic determination of the content of volatile aromatic hydrocarbons , naphthalene and volatile halogenated hydrocarbons - purge - and - trap method with thermal desorption 土质.挥发性芳香烃类物质萘和挥发性卤化烃含量的气相色谱分析测定.有热解吸作用的洗涤和打击法