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- external chemical messenger 外源性化学信使
- A chemical messenger is, at least, a "double agent". It attracts some species and repels others. 化学信使至少是一种“双作用体”。它引诱一些昆虫，忌避另一些昆虫。
- Environmental hormone is a kind of external chemical substance which may disturb the incretion of human beings and vertebrates. 环境激素是指有可能干扰人与脊椎动物内分泌的外因性化学物质。
- The autonomic nervous system uses the hormone adrenaline, a neurotransmitter, or chemical messenger, to send signals to various parts of the body to activate the fight-or-flight response. 自身的神经系统利用肾上腺素，一种神经传递介质或者说是化学信使，把信号传递在身体的各个部位以刺激“战或逃反映”。
- Liquor to human body mostimportant influence in liver, because the liver is the bodily chemicalplant, the disintoxicating center, any external chemical substance,can inside the liver the metabolism. 酒对人体最重要的影响在肝脏，因为肝脏是身体的化学工厂、解毒中心，任何外来的化学物质，都会在肝脏里面代谢。
- interspecific chemical messenger 种(类)间的化学信使
- Those reward pathways can, however, be subverted by external chemicals (in other words, drugs) and by certain sorts of behaviour such as gambling. 然而，这些报偿机制可以被外来的化合物（换句话说就是毒品）以及某些特定的行为如赌博所破坏。
- Cytokines are chemical messengers that communicate between cells to direct and to enhance immune response. 细胞激素是细胞间的化学讯息传递者，用来刺激身体的免疫反应。
- Acne of external chemical origin 外部化学性痤疮
- Yan led an interdisciplinary ASU team to develop a way to use structural DNA nanotechnology to target the chemical messengers of genes, called RNA. HaoYan领导的亚利桑那州立大学的一支跨学科研究组开发了一种利用结构DNA纳米技术瞄准称为RNA的基因化学信使的方法。
- Chemical messengers such as epinephrine exert their effects by interacting with specialized receptors on the surface of target cells. 像肾上腺素一类的化学信使，靠著与目标细胞表面的特殊受体结合，以产生作用。
- The G protein itself is actiated by another protein, a receptor, which gets its cue to carry out its task from chemical messengers known as neurotransmitters. 蛋白本身被另一种蛋白激活，该蛋白是一种受体，他从作为化学信使的神经递质得到信号，并开始执行它的任务。
- Rather,it seems that the neurons release their chemical messengers along theentire length of these extensions and, in this way, excite theneighbouring cells. 相反，看起来似乎是神经元通过整个神经细胞胞突释放其化学信使，并且利用这种方法激活周围细胞。
- He is just listening in external of that room. 他正在那房间的外面留神听着。
- This news program only covers external events. 这一新闻节目只报道国外消息。
- She sets great store by external politeness. 她很注重表面的虚礼。
- A reactor is a container for chemical reaction. 反应器是进行化学反应的容器。
- The chemical symbol for copper is "Cu". 铜的化学符号是Cu。
- We are doing a chemical experiment. 我们正在做化学实验。
- My major is the subject of chemical engineering. 我的专业是化学工程学。
