Securitize the cash flow 是什麼意思

Japanese Telecom plan to raise about 1.4 trillion yen by securitizing the cash flow of its operations. 麻煩告訴我是什麼意思 cash flow 我知道是現金流轉 securitize好像是發行證券的意思 但是 發行證券現金流轉 這樣翻好像很不通順 另一題是 The business software maker expanded into educational software,____ concerns from its... 顯示更多 Japanese Telecom plan to raise about 1.4 trillion yen by securitizing the cash flow of its operations.

麻煩告訴我是什麼意思
cash flow 我知道是現金流轉
securitize好像是發行證券的意思
但是 發行證券現金流轉 這樣翻好像很不通順

另一題是
The business software maker expanded into educational software,____ concerns from its shareholders.
A.even
B.despite
C.however
D.although
答案是B
請問
despite為什麼可以接直接接concern??其他的卻不行??
我只知道它是介係詞....
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