By the third exam, however, differences across sections became clearer.
const usage = `example-command [-abc] [-v[] ...
，更多细节参见PDF资料
一、制定国家发展规划法的必要性和重大意义。PDF资料是该领域的重要参考
Reform and the Green Party have also been asked to comment.
timeout: Seconds to wait before raising `asyncio.TimeoutError`. None means wait forever.