During childbirth, larger babies have more difficulty passing through the birth canal.
在分娩时，较大的婴儿更难通过产道。
2
The committee recognizes the difficulty in identifying infants infected with HIV at birth in settings where diagnostic and treatment services for mothers and infants are limited.
委员会认识到，在对母亲和婴儿的诊断和治疗服务有限的地方很难在出生时确定婴儿是否已感染HIV。
3
Then they moved on from Bethel. While they were still some distance from Ephrath, Rachel began to give birth and had great difficulty.