Acids are chemical compounds which, in aqueous solution, have a sharp taste, a corrosive effect on metals, and the ability to turn certain blue vegetable dyes red.
酸是一种化合物，在水溶液中具有强烈的味道、对金属有腐蚀作用，并能使某些蓝色植物染料变红。
Billie Holiday's renown as a great jazz - blues singer rests on her capacity to endow her songs with emotional depth.
比莉·荷莉戴（Billie Holiday）作为一名伟大的爵士 - 蓝调歌手的声誉建立在她能赋予歌曲情感深度的能力之上。
Essentially, a theory is an abstract, symbolic representation of what is conceived as reality.
从本质上讲，理论是对被视为现实的事物的一种抽象、符号化的表征。
Long before children can speak or understand a language, they communicate through facial expressions and by making noises.
在儿童能够说话或理解一种语言之前很久，他们就通过面部表情和发出声音来进行交流。
Thanks to modern irrigation, crops now thrive in areas where once only cacti and sagebrush could survive.
多亏了现代灌溉技术，农作物现在在曾经只有仙人掌和山艾树才能生存的地方茁壮成长。
The development of mechanical timepieces spurred the search for more accurate sundials to calibrate them.
机械计时器的发展促使人们寻找更精确的日晷来校准它们。
Anthropology is a science in that anthropologists use a set of rigorous methods and techniques to document observations that can be verified by others.
人类学是一门科学，因为人类学家使用一套严谨的方法和技术来记录可被他人验证的观察结果。
Fungi play a crucial role in the decay process, which returns substances to the soil, enhances soil fertility, and decomposes animal remains.
真菌在腐烂过程中起着至关重要的作用，这个过程将物质返还给土壤，提高土壤肥力，并分解动物残骸。
When struck, a tuning fork produces an almost pure tone that retains its pitch for a long time.
当被敲击时，音叉会产生一种几乎纯净的音调，其音高能长时间保持不变。
Although pecans are most plentiful in the southeastern United States, they can be found as far north as Ohio and Illinois.
虽然美洲山核桃在美国东南部数量最多，但在北至俄亥俄州和伊利诺伊州也能发现它们。