substituted acid 羧酸的烃基中含有其他取代基的酸。 例如卤代酸R（X）·COOH、羟基酸R（OH）COOH、氨基酸R·（NH2）COOH等。
这些氨取代酸可以与未取代的氧络阴离子相类似方式聚合。
These amine substituted acid may polymerize in an analogous manner to unsubst stated oxo - anions.
蛋制品能够取代在食谱中的未煮熟的生蛋(比如凯撒沙拉，荷兰酱，自制蛋黄酱，冰淇淋，酸橙派)。
Egg products can be substituted in recipes typically made with raw eggs that won't be cooked (for example, Caesar salad, Hollandaise sauce, eggnog, homemade mayonnaise, ice cream, and key lime pie).
在所有已存在的生命形式中，细胞的蛋白质合成机制通过读取代表核苷酸的四个DNA化学“字母”来合成氨基酸链。
In all existing life forms, the cell's protein-making machinery reads the four chemical "letters" of DNA - called nucleotides - in triplets to make chains of amino acids.
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