【評論主題】【題組】⑵ The Arctic Ocean may seem remote and forbidding, but to birds, whales and otheranimals, it’s a

【評論內容】ㄧ、卵子期（接合子期)》受精～兩週。 二、胚胎期（細胞和組織分化期）》三週～兩個月。 三、胎兒期（器官和功能分化期）》三個月～出生。