第 1 周：定义输入/输出标准与红线
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.
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Most surprisingly, the Uncharted is the first front-wheel-drive Subaru sold in the United States since the Impreza switched to all-wheel-drive for model year 1997. The base FWD Uncharted will therefore offer a class-leading range estimate of 308 miles (496 km), while the Sport AWD trim can do 287 miles (462 km). Subaru has reportedly partnered with Panasonic to develop solid-state batteries for a Solterra replacement, but that project is still in development.
Range, and number of supported devices