这句话中为何不用lack的ing形式?Throw in a couple of weepy one-liners大神们帮帮忙

这句话中为何不用lack的ing形式?Throw in a couple of weepy one-liners大神们帮帮忙
Throw in a couple of weepy one-liners about “（lack） of a childhood” and “having too much responsibility too soon" 这是原文,后面都用了having,前面为什么不用用lack的ing形式呢?他们是并列的啊.高手帮忙解答.谢谢