P-wave displacement is a polar vector, and its direction remains unchanged when we move it from right hand coordinate system to left hand coordinate system(or in the opposite way).
纵波位移是极向量，在坐标系由右手坐标系变成左手坐标系（或相反）时，不改变位移方向；
The stuff in our life must be arranged, cleaned, moved, taken with us when we move... it takes up the space in our life, it is visual stress.
我们必须整理它们，清扫它们，搬迁它们，我们搬家的时候，我们还得带上它们…物品占据了我们的生活空间，是实实在在的负担。
The stuff in our life must be arranged, cleaned, moved, taken with us when we move... it takes up the space in our life, it is visual stress.
我们必须整理它们，清扫它们，搬迁它们，我们搬家的时候，我们还得带上它们…物品占据了我们的生活空间，是实实在在的负担。
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