natural uranium reactor n. 天然鈾（原子）反應(yīng)堆natural uranium graphite reactor [物理學(xué)]天然鈾石墨慢化反應(yīng)堆natural uranium fission chamber [物理學(xué)]天然鈾裂變室natural travel notes [文學(xué)]性霛遊記natural torsional frequency [動(dòng)力與電氣工程]自由扭振頻率natural tolerance limit [數(shù)學(xué)]自然允差界限natural tilt-angle test [地球科學(xué)]自然坡角試騐natural theology natural tendency 自然趨勢natural technology [土木建築工程]自然化技術(shù)[文學(xué)]自然技術(shù)natural talent 天賦，自然稟賦natural survival condition [文學(xué)]自然的生存狀態(tài)natural stonework [土木建築工程]天然石砌築natural stone curtain wall [土木建築工程]石材幕牆natural stone 天然石；天然石材；天然寶石natural state natural spring natural speech understanding systems [語言學(xué)]自然語言語音理解系統(tǒng)natural son 親生兒子natural soil fertility [辳業(yè)科學(xué)]自然地力