They are located in tissues ( the apical meristems ) at the growing points of roots and stems.它们位于根和茎的生长点组织 ( 顶端分生组织 ) 中....the twisted roots of an apple tree.苹果树盘绕的根The fishline became enmeshed in roots under the water....
除氧剂 、 干燥剂 、 保鲜剂制售; 粮油食品销售.Chuyang agents, desiccant, preservation of manufacturing and selling agent ; With food sales.含有锰的生铁,用作除氧剂,用在制钢时提高锰的含量.An alloy of iron and manganese used in the production of steel.是锅炉给水和蒸汽换热设备的...