-v, --verbosity[=] verbose output
‘Overall we are moving in the right direction’，更多细节参见体育直播
It’s almost that time again — spring cleaning season. But are your tools up to the task? If you need a device that can deep-clean every surface, look no further than the Dyson V15 Detect Extra Cordless Vacuum. This powerful cordless vacuum can tackle dirt and dust all over your home, and it’s currently on sale for $339.99 (reg. $599.99).，这一点在体育直播中也有详细论述
但這位總統面臨的挑戰在於，他的公眾支持率徘徊在40%左右，而美國民眾希望他採取更多行動來解決他們的擔憂。上個月，他在白宮發表全國演說時，也使用了類似主題與統計數據——但未能說服公眾。總統與他的幕僚似乎寄望於國情咨文更大的觀眾群（預計數千萬人）能帶來不同結果。
(i \in [0, n]) as follows, given our points (x_i, y_i):