" All clear! " her colleague, Antasia Bullen, shouts through a walkie-talkie.

“安全了！” 她的同事安塔西娅·布伦通过对讲机喊道。

Ms. Bullen counts to three. When she utters the word " Fire! " Ms. Achol presses the round button with both her thumbs.

当布伦数到三，说出“启动！”时，阿科尔用两个拇指按下了圆形按钮。