Translate examples/std_misc/channels/channels.rs
Translate examples/std_misc/channels/channels.rs

jinyuanxie/rust-by-example-cn,aakloxu/rust-by-example-cn,rust-lang-cn/rust-by-example-cn,jinyuanxie/rust-by-example-cn,aakloxu/rust-by-example-cn,rust-lang-cn/rust-by-example-cn