I hear of people recalling incidents from their early childhood-and even their infancy-but my dim and distant past is very dim indeed to me.

我听说有人能回忆起童年甚至婴儿时期的一些往事，但是我的过去依依稀稀，我确实记不清了。

youdao

The risk of undernutrition is also greater at certain times in a person's life ie infancy early childhood adolescence pregnancy and lactation and old age.

人一生中的某些阶段患营养低下的危险性也很高，如婴儿期、幼儿期、青少年期、妊娠哺乳期、以及老年期。

youdao

Children treated during infancy or early childhood are at the highest risk.

被治疗的孩子处于婴儿期或幼年时期是高度危险期。

youdao

Early childhood cancer near nuclear plants likely represents effects of exposures in utero and in infancy.

FORBES: French System For Cleaning Fukushima Water Blamed For Leukemia, Polluted Beaches In Europe