covalent network的用法和樣例：
例句
- Additionally, covalent modifications have effect on the mobility of some proteins.
另外蛋白質的共價修飾可對某些蛋白質的運動產生影響。 - Histone is the nucleus of chromatin, the covalent modifications in its tails form the histone codes that regulate a number of biological processes.
組蛋白是染色質的核心，其尾部的共價修飾組成組蛋白密碼，調節許多生物學事件。
