There is generally a higher degree of uncertainty regarding the future benefits that may be derived. Their value is subject to wider fluctuations because it may depend to a considerable extent on competitive conditions
oissue: bring out (esp. sth. printed and /or official) for the notice of the public发布,发行 -----The school issued a statement about its plans to the press. ---th newsletter(简报) is issued three times a year. -----The Ministry of Finance has decided to issue new government bonds(债券)
