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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。

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。

3·Unit load device. Any type of freight container, aircraft container, aircraft pallet with a net or aircraft pallet with a net over an igloo, an overpack is not included in this definition.

“集装器”是指任何类型的货物集装箱、航空器集装箱、带网的航空器托盘或者带网集装棚的航空器托盘，此定义不包括集合包装。