The single string test proved no problem, but unlike dogs (which Osthaus has previously tested) no cat consistently chose correctly between two parallel strings.
一条绳子的情况下没有问题。但是与狗不同（奥斯陶斯之前给狗做过实验），没有猫能够一直在两条平行的绳子里选择正确。
They were tested in three ways, using a single baited string, two parallel strings where only one was baited, and two crossed strings where only one was baited.
实验用三种方式展开：一条系着诱饵的绳子，两条平行的绳子其中一条上有饵，和两条交叉的绳子其中一条上有饵。
They were tested in three ways, using a single baited string, two parallel strings where only one was baited, and two crossed strings where only one was baited.
实验用三种方式展开：一条系着诱饵的绳子，两条平行的绳子其中一条上有饵，和两条交叉的绳子其中一条上有饵。
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