He explained to the doctors that he felt really bad chest discomfort and had been coughing badly for quite some time.

他向医生解释说，他感到胸部非常不适，而且咳嗽得很厉害，已经有段时间了。

After the seed grew into a sapling, its little needle started to damage the tissue surrounding it, which resulted in chest discomfort and coughing.

种子长成树苗后，它的小针开始损坏周围的组织，导致胸部不适和咳嗽。