1·Diatomaceous earth (which we shall hereby call DE because it's a lot easier to type) is the fossilized remains of single-celled algae called diatoms.
硅藻土(下文简称DE)是一种被称为硅藻的石化单细胞海藻。
2·The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be fossilized.
微小纤细的骨骼通常在石化前就被食腐肉的动物拆散了，或者被风化作用破坏掉了。
3·Depicts 270,000 fossilized shark teeth, equal to the estimated number of sharks of all species killed around the world every day for their fins.
作品描绘了27万个石化的鲨鱼牙，这个数字大致相当于全球每天为得到鱼翅而被捕杀的各个种类的鲨鱼数量。
1·Aspects of pronunciation, vocabulary usage, and grammar may become fixed or fossilized in second or foreign language learning.
方音、词汇用法和语法的各个方面在第二语言或外语学习中会成为固定或僵化。
2·But graduate education is conservative even by academic standards - which qualifies it as fossilized.
但研究生教育甚至在学术界都被视为保守，被形容为僵化。
3·Learner's inter-language fossilized some way short of target language competence while the internalized rule system contained rules that are different from those of the target language system.
学习者的语际语在未到达目的语言能力时，就发生了僵化，此时其内在化的规则体系与目的语语言体系所包含的规则不尽相同。
4·Fossilized features of pronunciation contribute to a person's foreign accent.
发音特征的僵化造成一个人的异国口音。