Fissiography
裂变产物自摄像术
🗣️ 情景例句
We are, too.
我们也很兴奋。
There are one hundred pennies in every dollar.
每美元是一百美分。
But suppose the earth could be covered with sensors spaced one foot apart,
假设地球上可以布满传感器，每个相隔1英尺，