常見例句雙語例句Brief or casual exposure to low levels of crystalline silica dust are said to not produce clinically significant lung disease.短暫或偶然暴露水平較低的結(jié)晶矽塵表示,不會產(chǎn)生臨床顯著的肺部疾病。A light gray volcanic rock containing a mixture of plagioclase and other crystalline minerals in glassy silica, similar in appearance to rhyolite.一種淺灰色的火山巖,包含斜長石與其它呈光滑硅土狀的結(jié)晶礦物,在外表上與流紋巖相似。The mineral crystalline morphology of foundry natural silica sands has been investigated, which can be divided into two groups:single crystal and polycrystalline gather.考查了鑄造用天然硅砂的礦物晶體形態(tài), 可將其大致分為單晶體和多晶集合體兩類。 返回 crystalline silica