Mothers and infants were enrolled in a trial of vitamin a supplementation during which the infants' weight, length and feeding practices were assessed regularly.
这些母亲和婴儿参与了一项维他命补充试验，试验过程中定期评估婴儿的体重、身高和喂养方法。
2
Some ants, when they arrived at the feeding station, had the ends of their legs amputated, to shorten their stride length.
有的蚂蚁抵达饲喂点后，就将其腿部末端切除，以缩短其步长。
3
The sawing speed curve is unchangeable, but the feed speed curve can be different with different length ratio of members of the feeding mechanism.