军士是海军的骨干。Petty officers are the backbone of a navy.军士为部下不整洁的服装而责骂他们.The sergeant lashed the troops for their sloppy dress.将军表扬这位勇敢的军士.The general commended the sergeant for his bravery....
He suggested we get together for a drink sometime. I said I'd like that, and we left it there.他建议我们找个时间出来喝一杯。我说好，然后我们就换了个话题。I'm not such a misery now! I gave up drink a few years back and that has changed thing...
The typical K - F reagent has disadvantage of high poisonousness and pyridine malodor.经典K-F试剂缺点是毒性大,且具有吡啶的恶臭.This preparation uses dialkyl imidazole salt, alkyl pyridine salt or caprolactam and fatty acid as reactant.该方法...