"Now if there's just a change of seasons, and the air pressure changes at the bottom of the river, the marsh gas from the bottom will surge up, and then catch fire," says Ho; it seems like she is describing two completely different ditches.
「現在只要季節一變化，河底氣壓改變，水底的沼氣會冒上來，然後著火……」柯勉前後形容的，彷彿是兩條不同的渠道。