相位裕度是系统在变得不稳定之前可以容忍的程度的度量。
"You can't control everything. Sometimes you just need to relax and have faith that things will work out. Let go a little and just let life happen."
曾有人问过张柏芝,如果给你一个重返18岁的机会,你会怎么选择呢?