One set of bees, called the demonstrator bees, were trained to use the blue or red tab.

其中一组蜜蜂，被称为示范蜜蜂，被训练使用蓝色或红色标签。

Scientists designed a two-option puzzle box that could be opened by pushing a red tab clockwise or a blue tab counterclockwise.

科学家们设计了一个有两个选项的谜题盒子，可以通过顺时针按红色按钮或逆时针按蓝色按钮来打开。

The experts devised a puzzle box that could be opened using either a blue tab or a red tab to access a sugar reward inside.

专家们设计了一个益智盒子，可以用蓝色或红色标签打开，就能获得里面的奖励--糖。