Some cells produced in bone, called osteoblasts, build bone where it is needed.

有些细胞源自骨骼，称为造骨细胞，在需要时可以构造骨骼。

youdao

This allows the bone to grow strong because other cells called osteoblasts then rebuild the bone.

这使得骨骼有机会变强壮，因为另一种骨细胞--成骨细胞将随之重建骨骼。

youdao

This allows the bone to grow strong because other cells called osteoblasts then rebuild the bone.

这使得骨骼有机会变强壮，因为另一种骨细胞--成骨细胞将随之重建骨骼。

youdao