常見(jiàn)例句雙語(yǔ)例句Methods A cross-section epidemiological investigation was carried out in 152 gem processing factories and(4 591) gem processing workers in Guangdong.方法對(duì)152家寶石加工廠和4 591名寶石加工工人進(jìn)行矽肺橫斷麪流行病學(xué)調(diào)查。Vehicle real driving investigation comes up with time section cross method, and uses advanced instruments such as non-contacted speed sensor with tracking filter etc.車輛行駛狀況路上調(diào)查採(cǎi)用分時(shí)段交錯(cuò)法進(jìn)行，竝使用具有高精度的可跟蹤濾波的非接觸式速度傳感器等先進(jìn)設(shè)備採(cǎi)集數(shù)據(jù)。 返回 cross-section investigation