dǎo / yǎn / yì / hǎn / kāi / mài / lā / yǎn / yuán / men / mǎ / shàng / jìn / rù / le / zhuàng / tài

导演一喊开麦拉，演员们马上进入了状态。

As soon as the director called “camera,” the actors immediately got into character.