常見例句雙語例句If the search-string is not found, and neither argument is null, the result is zero.如果沒有找到搜索字符串，并且參數(shù)都不為空，則所得的結(jié)果是零。If the string to be searched is not found and neither argument is null, the result is 0.如果沒有找到搜索字符串，并且參數(shù)都不為空，則所得的結(jié)果是 0。 返回 null string argument