氨基酸是弱酸和弱碱, 因此, 它们是很好的缓冲剂.Amino acids are weak acids and weak bases, therefore, they are excellent buffering agents.缓冲剂可以像烤面包的苏打粉那样使用,它们都能够使ph值保持稳定.Buffers can be used like baking soda will help keep ph stable.着重叙述了缓冲剂原理及...
The director wanted Olivia de Havilland, then under contract to Warner Brothers.导演想要当时签约于华纳兄弟娱乐公司旗下的奥利维娅·德哈维兰出演。Police said they arrested Olivia because her statements did not add up.警方说他们之所以逮捕奥利维娅是因为她无法自圆其说。Olivia has a...
They may even have raced each other — but not regularly.他们甚至可能曾经相互比试过，只不过不是经常性的。He raced ahead up into the bush, barking and snarling.它嗥叫着冲向前，一头钻进了灌木丛。In the 10 years I raced in Europe, 30 drivers were killed.在我10年的欧洲赛车生...