to stack up
[phrase form: stack]
01
堆叠, 摞起来
to neatly arrange objects, usually in a vertical arrangement, forming piles
Transitive: to stack up sth
例子
After finishing the puzzle, she decided to stack the pieces up neatly on the table.
完成拼图后，她决定将碎片整齐地堆叠在桌子上。
02
堆积, 在空中排队
(of aircraft) to fly over an airport at different heights, waiting for specific landing instructions
Intransitive
Transitive: to stack up an aircraft
例子
During the storm, planes were forced to stack up in the air, creating a challenging situation for air traffic control.
在风暴期间，飞机被迫在空中堆积，给空中交通管制带来了挑战性的情况。
