A difficulty here, however, is that the TransformStreamDefaultController does not have a ready promise mechanism like Writers do; so the TransformStream implementation would need to implement a polling mechanism to periodically check when controller.desiredSize becomes positive again.
（三）为实施考试作弊行为，向他人非法出售、提供考试试题、答案的；。业内人士推荐同城约会作为进阶阅读
By Will Standring and Alice Gledhill，更多细节参见服务器推荐
A huge investigation was launched after the Columbia disaster