1、 Another factor may be that more people are trying to overpack their carry-on bags to avoid checked-baggage fees, though the airlines strongly dispute this.
另一个因素可能是，即使航空公司强烈反对，还是有越来越多的人为了避免托运行李费用而试图携带过量的随身行李。
来源:
2、 Another factor may be that more people are trying to overpack their carry-on bags to avoid checked baggage fees, though the airlines strongly dispute this.
另一个可能的原因是，虽然航空公司强烈反对，但更多的人还是会为了逃避托运行李的费用，而把随身行李塞得满满的。
来源:
文