TPO 23 Seventeenth-Century Dutch Agric - 英檢

第一段看很多次還是不懂他的意思?

不知道有人能幫忙看一下我盲點是在哪邊嗎@@?

Agriculture and fishing formed the primary sector of the economy in the
Netherlands in the seventeenth century. Dutch agriculture was modernized and
commercialized new crops and agricultural techniques raised levels of
production so that they were in line with market demands, and cheap grain was
imported annually from the Baltic region in large quantities. According to
estimates, about 120,000 tons of imported grain fed about 600,000 people:
that is about a third of the Dutch population. Importing the grain, which
would have been expensive and time consuming for the Dutch to have produced
themselves, kept the price of grain low and thus stimulated individual demand
for other foodstuffs and consumer goods.

最疑惑是在為什麼說Dutch水平上升後會是 cheap grain was imported annually from the Baltic in a large quantity.

還有相關的最後一句是說引進便宜的grain可以讓dutch自己種些別的作物嗎?

感謝!!

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