You can go into and out of PHP mode as necessary (to issue echo statements that output variables into the Web page as I've done above, for example).

您可以根据需要(例如，如我在上面所做的那样，发出echo语句以将变量输出到网页中)进入或退出php模式。

youdao

In my paintings I try to express the bond with nature that I feel when I go to the mountains or look the clouds, a kind of echo between the landscape and myself.

在我的作品中，我试图要表达出当我在攀走山脉，观赏游云时感触到的与自然的联系，一种山水与我自身之间的共鸣。

youdao

Charlie 1: Go ahead, Echo 1.

CNN: Tear gas canister 'bounced off' Waco bunker

For some writers it's a compulsion to go that distance and hear their voice as a remote echo.

WSJ: The Novelists