For years, Jackson seems to have swallowed a variety of pills ad libitum.
多年以来，杰克逊看起来已经随意吞咽了许多种药片。
2
Proteins and low-GI foods ad libitum -- the way ahead
蛋白质和不限量低 GI 食物—曙光在前
3
Abstract : This experiment was conducted to investigate the effects of hot and humid environment on feeding behavior in growing-finishing pigs with ad libitum feeding.