How to say the quality of their products has gone down over the years. in Japanese
1)
ここここ(koko) (num) nine数年数年(suunen) (n) several yearsにわたってにわたって(niwatatte) (exp) throughout/over a period of .../over a span of ...彼ら彼ら(karera) (n,adj-no) those/theyのの(no) (prt) indicates possessive/nominalizes verbs and adjectives/substitutes for "ga" in subordinate phrases/indicates a confident conclusion/ indicates emotional emphasis/indicates question製品製品(seihin) (n) manufactured goods/finished goods/productのの(no) (prt) indicates possessive/nominalizes verbs and adjectives/substitutes for "ga" in subordinate phrases/indicates a confident conclusion/ indicates emotional emphasis/indicates question質質(shitsu) (n) collateral/pledge/pawned articleはは(ha) (int) indicating a subject/yes/indeed/well/ha!/what?/huh?/sigh落ち落ち(ochi) (n) slip/omission/outcome/final result/the end/punch lineてきたno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verb。。(。) Japanese period "."
