Polyphosphazenes
[化] 含磷氮链聚合物
🗣️ 情景例句
Could you please say it again?
你能重复一下吗？
She fears Tom will drop out of school.
她担心汤姆会休学。
because balloons can be a great danger to aircraft.
因为气球有可能给飞机造成极大的危险。