Aspirin is synthesized through O - acylating reaction from acid and anhydride acid with anhydrous carbonate as catalyst.以水杨酸和乙酸酐为原料,采用无水碳酸钠作为催化剂经O - 酰化反应合成了阿司匹林.One advisable way is to synthesize NFM acylating morpholine...
The little boat kept veering from its course in such a turbulent river.小船在这湍急的河中总是改变方向.The seas grew turbulent, tossing the small boat like a cork...海浪变得汹涌澎湃，把小船像漂浮的软木塞一样抛来甩去。Fluidization has had a rather turbulent histo...
He removes a thorn from a lion's paw.他从狮子脚掌上拔下一根刺。The little boy stepped on a sharp thorn.那小男孩踩着了一根尖刺。...the thorn and bramble thickets.荆棘密布的灌木丛The thorn of bone may dislodge from his throat without surgery.也许不用动手术就...