Photocathode
n. 光电阴极
🗣️ 情景例句
Something important.
一件重要的事。
Take a closer look!
你给我看清楚一点！
Then the Class 2 runner dropped his stick on the ground when he was passing it on to the fourth runner.
忽然2班的运动员在传棒给第四个运动员时，把棒弄掉到了地上。