The "forward" face guard theory and "backward" pharynx sound theory, developed from the Italian traditional Bel Canto, are the core threads that run through all ideas in various vocal music schools.

源自意大利传统美声唱法的“靠前”派面罩说、“靠后”派咽音说，是贯穿各声乐学派艺术理念的中心线索。

youdao

"Today,in the face of violence from those who would only destroy, Iraqis took a step forward in the hard work of building up their country.

VOA: special.2010.03.13

Here we have two of our T.A.'s, actually these are the two head T.A.'s, and I want you to face forward so you don't see what I'm doing.

我们的两个助教在这里,事实上是两个助教主管,把脸朝前,不要看到我的动作

耶鲁公开课 - 博弈论课程节选

"We need to understand that the decisions that the president faces on Afghanistan are some of the most important he may face in his presidency about how we go forward there.

VOA: standard.2009.09.22

And if we do that, then we can move beyond governing from crisis to crisis to crisis, and we keep our focus on policies that actually create jobs and grow our economy, and move forward to face all of the other challenges we face, from fixing our broken immigration system to educating our kids to keeping them safe from gun violence.

WHITEHOUSE: President Obama Speaks on American Energy

All of the monkeys, between the ages of five and 20, were photographed, face forward.

ECONOMIST: Health indicators

There was a good roller coaster with loops, where you are lying horizontally, face forward, like you are flying.

FORBES: Connect