次の文で質問なのですが...
Mate is a beverage found in much of South America. While it is uncertain where mate was first made there are more varieties of it found in Paraguay than anywhere else. Also, mate is used more widely there than anywhere else. Also, mate is used more widely there than anywhere else. Therefore, Paragua is likely tehe place where mate originated.
という文があるとして、
Typically, the longer a beverage has been in use in a particular place, the more widely that beverage is used there.
という文が結論をさらに強めるらしいんですがなぜでしょうか。
別に長く使われていたからと言って、そこでつくられたとは限らないのではないですか？
また違う文ですが、
The amphibian species whose population declines have been attributed by many scientists to industrial pollution are not known to be among those species whose populations do not vary greatly as a result of natural variations in the weather.
の意味がちょっとわかりづらかったです...よろしければ訳をいただけますか？
