赤杨属于桦木科.Alder trees belong to the birch family.而与赤杨共生的微生物是放线菌.The microorganisms involved in symbiosis with the alder tree are actinomycetes of the genus Frankia.这些幽静去处得天独厚,垂柳, 赤杨及其他抽枝发芽较早的树木长得非常茂盛.The weeping - willow ,...
Eventually hydrogen becomes fixed in traps in the metal, leading to hydrogen embrittlement.终于,氢渐渐地被固定在金属内部的“陷阱”中而导致氧脆.However, embrittlement occurs in some metals at elevated temperatures and pressures.但是, 当温度和压力升高时,某些金属...
However, solid state dosimetry with thermoluminescent materials is also included.然而, 也论及使用热释光材料的固体剂量学.They may be expected to retain an important place in radiation dosimetry and radiation instrumentation generally.在辐射剂量...