缺乏锻炼会导致抑郁和疲劳。Lack of exercise can lead to feelings of depression and exhaustion.据信薄荷叶可以减轻疲劳和鼻塞。Peppermint leaves are believed to relieve tiredness and nasal stuffiness.贫血的症状包括虚弱、疲劳和缺铁。Symptoms of anaemia include weakness...
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...