English:(literally: a mosquito's thigh compared with a cow's thigh); there is a great disparity between two things, where one is incomparable to the other
English:(Metaphor) in a situation when people are talking, someone speaks/replies with irrelevant speeches. It implies that someone speaks with nonsense.
English:(phrase) to buy time for something, e.g. a job, while waiting for a better opportunity to come along (literally "to ride an ox looking for a horse")