point centromere的用法和樣例：
例句
- The duplicates are attached to each other at a constricted region called the centromere.
對偶體彼此相連于稱(chēng)為著(zhù)絲粒的縮小的區域。 - The centromere contains the kinetochore, a structure involved in the attachment of the chromosomes to the spindle during nuclear division.
著(zhù)絲點(diǎn)上包含了著(zhù)絲粒，著(zhù)絲粒確保細胞在分裂中染色體與紡錘體的整合，發(fā)生有序的染色體分離。
