足够大用英语可以表达为 "large enough" 或 "sufficiently large". 来源可能源于英语中 "enough" 这个词的用法。例如：

This box is large enough to hold all of the books. (这个盒子足够大，可以装下所有的书。)

The quantity of food is sufficiently large to feed everyone at the party. (食物的数量足够大，可以满足派对上每个人的需求。)

希望这些信息对您有帮助。