Verify the output.
self.tags = tags or []，详情可参考PDF资料
translating concepts between programming languages.，详情可参考PDF资料
The upshot: I struggle to imagine a process whereby an obscure English children’s game somehow inspired gestural customs in Georgia, Egypt, Russia, and Iran within less than a century. It seems more reasonable to me that these customs might instead originate in an ancient Mediterranean tradition of apotropaic magic, or charms intended to combat bad luck.，详情可参考PDF资料
Doohan revealed threats and abuse on Drive to Survive