圖像來源，SCREENSHOT
Grammar is destiny.
，这一点在im钱包官方下载中也有详细论述
A Google spokesperson told the BBC: "We're deeply sorry for this mistake. We've removed the offensive notification and are working to prevent this from happening again."
int left = 2 * i + 1; // 左子节点
Forgetting releaseLock() permanently breaks the stream. The locked property tells you that a stream is locked, but not why, by whom, or whether the lock is even still usable. Piping internally acquires locks, making streams unusable during pipe operations in ways that aren't obvious.