package mainimport (    "fmt")func write(ch chan int) {    for i := 0; i < 5; i++ {        fmt.Println("avaliable", i)        ch <- i        fmt.Println("successfully wrote", i, "to ch")    }    close(ch)}func main() {    ch := make(chan int)    go write(ch)    for v := range ch {        fmt.Println("read value", v, "from ch")    }}輸出avaliable 0successfully wrote 0 to chavaliable 1read value 0 from chread value 1 from chsuccessfully wrote 1 to chavaliable 2successfully wrote 2 to chavaliable 3read value 2 from chread value 3 from chsuccessfully wrote 3 to chavaliable 4successfully wrote 4 to chread value 4 from ch由于這是一個無緩沖的通道，它應該在數(shù)據(jù)寫入它時立即阻塞，直到另一個 goroutine 從同一通道讀取。但它接受的數(shù)據(jù)超出了它的能力。預期行為package mainimport (    "fmt"    "time")func write(ch chan int) {    for i := 0; i < 5; i++ {        fmt.Println("avaliable", i)        ch <- i        fmt.Println("successfully wrote", i, "to ch")    }    close(ch)}func main() {    ch := make(chan int)    go write(ch)    time.Sleep(time.Second)    for v := range ch {        fmt.Println("read value", v, "from ch")        time.Sleep(time.Second)    }}輸出avaliable 0read value 0 from chsuccessfully wrote 0 to chavaliable 1read value 1 from chsuccessfully wrote 1 to chavaliable 2read value 2 from chsuccessfully wrote 2 to chavaliable 3read value 3 from chsuccessfully wrote 3 to chavaliable 4read value 4 from chsuccessfully wrote 4 to ch如果在整個代碼中放置了一些計時器，以便主 goroutine 在每次迭代之前被阻塞，它就會按預期工作。