此前就已指出，气候变化对沿海城市构成重大威胁。
As noted previously, climate change poses a significant threat to coastal cities.
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as英 /æz/|美 /æz/
noted英 /ˈnəʊtɪd/|美 /ˈnoʊtɪd/
previously英 /ˈpriːviəsli/|美 /ˈpriviəsli/
解释
"As noted previously" 回指前文已观察到的现象或观点。"noted" 表示注意到/指出，"previously" 指向前文，常用于学术或分析性写作。
As noted previously, climate change poses a significant threat to coastal cities.
"As noted previously" 回指前文已观察到的现象或观点。"noted" 表示注意到/指出，"previously" 指向前文，常用于学术或分析性写作。