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 ,...
他熟谙经典, 慎求古训, 又能别出心裁.He was familiar with the classic, ancient Shen - seeking, but also ingenuity.这些黑客在时刻重复着一条古训: 如果什么东西看起来过于美好不像真的, 那么它可能的确不是真的.Such hacking an old adage: if something looks too good to be true, it probab...
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...