婴儿刚学走路时总是摇摇晃晃的。

Babies often ___wobble when they are learning to walk.

面对两个同样好的选择，他开始犹豫不决。

Faced with two equally good options, he started to ___wobble in his decision.

合成器的音色旋钮能在声音中制造出微妙的波动效果。

The synthesizer's tone knob creates a subtle ___wobble in the sound.