The causes of tarnishing gold and silver - plated connectors were studied respectively.分别探讨了接插件镀金和镀银层变色的原因.Bright tin electrodeposits on copper wire are susceptible to tarnishing.铜线材经光亮镀锡后易产生腐蚀变色.Do they not realize thei...
抗酸剂是碱性的，通过中和胃容物中的酸来减轻疼痛。Antacids are alkaline and they relieve pain by neutralizing acid in the contents of the stomach.这种水呈强碱性的.This water is strongly alkaline.不正碱性的纸张, 其本质是恒定的, 不常无法矫侧.Acid paper, its nature is constant...
报道一种快速检测冰箱除臭器对乙硫醇驱除效率的气相色谱分析方法.A gas chromatographic method to quickly test the efficiency of refrigerator deodorizer in eliminating ethanethiol paper....
A pH test measures the acidity or alkalinity of a substance.pH值测试可检测物质的酸碱度。This plant prefers alkaline soil, though it will readily tolerate some acidity.这种植物在酸性土壤中也能生存, 但硷性土壤更加适宜.Acidity in soil can be neutralized by sp...
He spoke in a flat monotone.他说话单调低沉。She talked in a deep nasal monotone.她说话鼻音很重，语调单一。completely monotone完全单调a cat with a monotone coat.一色皮毛的猫The evidence was read out to the court in a dull monotone.证据被当庭呆板地宣读了一遍。a monot...
They talked modestly of their valiant efforts to keep the tanker afloat.他们说起自己设法使油轮漂浮的英勇之举时非常谦虚。We kept her afloat for a couple of hours by bailing frantically.我们拼命往外舀水，使它继续漂浮了几个小时。A number of efforts were being made to ...
Protection of sites, habitats and landscapes is of uppermost priority.保护遗址、栖息地和风景区是重中之重。More familiar landscapes have been sculpted by surface erosion.还有更多熟悉的地貌是因地表侵蚀形成的。Constable's landscapes met with indifference ...