for queue in self._watch_queues:
View a PDF of the paper titled Flip Distance of Triangulations of Convex Polygons / Rotation Distance of Binary Trees is NP-complete, by Joseph Dorfer
，这一点在电影中也有详细论述
Ruari Cannon, who has waived his right to anonymity, was an actor at the London venue when Spacey was its artistic director.，详情可参考PDF资料
Musk's more stoic responses echoed those of one of his highest level employees, Jared Birchall, who testified before the jury on Tuesday. Birchall heads Musk's family office and personal financial investments and business dealings.，这一点在wps下载中也有详细论述
if new_value == self._value: