translation.en: And we've just recently demonstrated this by putting extract of hydrocarbons on little glass beads, and dropping the beads gently down into the nest entrance at the right rate.
translation.zh: 我们最近展示了这个原理。 我们把浓缩的碳氢化合物涂在小型玻璃珠上， 以正确的频率轻轻地丢在蚁穴入口，