Polyphenyl
聚苯
🗣️ 情景例句
The only entry requirement is a valid passort.
入境的唯一条件就是持有一本有效的护照。
Time past never returns, amoment lost, lost for ever.
过去的时间决不返回，浪费一点，永远消失。
On his return to India he had the chance to travel to South Africa to work on a law case.
一回到印度，他就得到一个去南非办理一桩法律案件的机会。