如何在PHP中正确和安全代表迭代器吗？
安全代表保留一份原件，一份复印件必须随材料一起出大门。
The Safety Representative retains one copy and the original and one copy must accompany the material to the gate.
而作为助理和安全代表，她怀着超级推销员的热情足迹遍及全球。
But being an aide and security agent, she tools across the globe with the zeal of a super-sales woman.
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