Safety is the prime factor to consider when people choose where to travel.
出行旅游要考虑诸多因素，其中安全是最重要的。
The pore structure is the prime factor which will decide the performance of carbon membrane.
炭膜的孔结构是影响炭膜性能的根本性因素。
The pore structure is the prime factor which will decide the performance of carbon membrane.
炭膜的孔结构是影响炭膜性能的根本性因素。
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