| 词汇 | 化学 |
| 释义 | 化学 🧪 But what really happens is as you go on in chemistry, you draw so many of these you can just draw them without following the rules. Now, this is the chemistry lab. Have you been in the lab before? We know the constitution of mineral through chemical analysis. Every chemical substance is a key to the gates of heaven and hell. Each of them is mediated by a distinct condition of brain chemistry. Let me tell you a story about organic chemistry. If you pause for a second and think of the many colours, shapes and textures around us, they are all the product of specific and unique chemical reactions that take place within. He specialises in chemistry. It describes a chemical system that can be built, and once it’s built, you can watch the origin of evolution. She commenced studying chemistry. He is mugging up on his chemistry for the final examination. Our chemistry teacher rears all kinds of birds. One thing we want to explore is how they developed their knowledge of chemistry. We know that at one extreme we have no chemical reactivity. We know they smear a liquid on the tube, but we don’t know where they secrete it from or what its chemical composition is. Today she says she loved her long career in chemistry. Because so much of what we do in chemistry does take place with constant temperature and pressure. She gave up because she had chemistry homework to do, but vowed to figure it out after finals. Unlike the medicine and physics prizes, the chemistry prize went to an individual. That's why I can use the same chemical potentials before and after. This is macromolecular chemistry. The metaphor extends to all of chemistry. Some of these food additives are not foods at all, but are chemicals that are generally recognized as safe. Until recently, the focus was all on “ smell”: that is, on how cells respond to chemical signals such as growth factors. That said, I think those kinds of findings are why we need to have stronger laws that require manufacturers to demonstrate the safety of chemicals that they put into commerce. Some kinds of acids react on metals to cause chemical changes. |
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