The radio reception isn’t very clear.

【clear，clearness】收音机的接收效果不太好。

He finally had enough money to buy a big house, but actually the only reason he was moving out of the city was so that he could have better ham radio reception.

他终于有了足够的钱买一栋大房子，但实际上他搬出城的唯一原因是为了能有更好的业余无线电接收能力。