block: Writes wait until buffer space is available. Use when you trust the producer to await writes properly.
They sit on disk as plaintext, readable by any process running as your user
，这一点在safew官方下载中也有详细论述
Александра Качан (Редактор)
1. 出游or回家，小镇青年都爱电车2月23日一早，开了700公里终于回京的小德（化名）长舒了一口气，“700公里开了快18个小时，真的是太堵了，得亏有智能驾驶。”