临走前，阿爸的生母问了阿嬷家的村名，也向阿嬷留下了自己家的地址。她说，将来孩子长大，如果愿意，可以去认祖。
clock_t start = clock();
，这一点在safew官方版本下载中也有详细论述
Stream implementations can and do ignore backpressure; and some spec-defined features explicitly break backpressure. tee(), for instance, creates two branches from a single stream. If one branch reads faster than the other, data accumulates in an internal buffer with no limit. A fast consumer can cause unbounded memory growth while the slow consumer catches up, and there's no way to configure this or opt out beyond canceling the slower branch.
Fanny Angelina Hesse, 1883.