the insurance cover is optional中的cover怎么解释

英语翻译Insurance cover are as follows:The insurance company ass 英语翻译PLEASE ARRANGE THE MARINE INSURANCE with extended cover an insurance to cover contractual cover is cover is open plesse close the scanner cover cover That is the book whose cover (of which the cover/the cover o INSURANCE COVER NOTE NO.的意思 like the book( )the cover is red He will cover the expenese and insurance 请帮我翻译下 国贸英语翻译帮忙翻译一下:should the buyers be unable to cover insurance Not taking out insurance to cover the sudden loss of a key e