主要控矿条件包括地层 、 构造和岩浆岩.The ore controlling condition is mainly composed of strata, magma, and structure.火山爆发的时候,岩浆岩把整个城市都淹没了.The magma submerged the whole city when the volcano erupted.断裂和岩浆岩是两大重要的成矿地质条件.The hydrothermal so...
战争期间，琼帮妈妈给战士们织围巾。During the war, Joan helped her mother knit scarves for soldiers.把公墓建成阵亡战士的永久性纪念碑的工作已经开始。Work began on establishing the cemeteries as permanent memorials to the fallen.为保卫祖国而献身的战士soldiers who died in def...