You can effectively influence your pup's behavior and mental development even in its first four weeks of life. 即使在幼犬剛出生的頭四周里，你也能很有效的影響他們的行為與智力發育。
It is not clear how subclinical hypothyroidism,where there is normal thyroxine,impairs fetal brain development. 妊娠期亞臨床甲減影響後代智力發育的確切機制尚不清楚。
His mental development kept pace with the growth of his body. 他的智力發展和他的體格發育齊頭並進。
Each must traverse the same intellectual scale of development, and each must master the same spiritual tests of progression. 每個必須通過同樣的智力發展的衡量，並且每個必須精通同樣的靈性發展試驗。
