11.18托?？荚嚱馕鲋?jiǎn)卧~題

　　單詞題

　　allowed for = made possible

　　harsh = severe

　　duration of sea ice = length of time the ice lasts

　　annihilated = destroyed

　　exposed = unprotected

　　with no warning = without any indication beforehand

　　congestion = crowd

　　outbreak = sudden increase

　　accompany = occur along with

　　converge = come together

　　severity = seriousness

　　dense = thick

　　eased into = slowly entered

　　retain = keep

　　inevitable = certain

　　determinants = causes

　　hastened = rushed

　　diffusion = dispersal

　　perfected = completed

　　enables = allows

　　in some degree = To a certain extent

　　Obvious = clear

　　Adjacent to = next to

　　Widespread = common

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