You're already in the upright and locked position.

您已经蓄势待发了。

Holding it-and holding it in the locked position.

拿着它, 拿着它在锁上的位置。

Put your lap trays and seat backs in the upright and locked position.

放好你的膝上托盘，并将座椅调到直立和锁定座椅位置。

A " tray table" is a small table that has to be also in its upright and locked position.

“托盘桌”是一张小桌子，也必须处于直立和锁定位置。

Now, in preparation for take-off, please fasten your seatbelt, return your seatback and tray tables to the full upright and locked position.

现在，为起飞做准备， 请系好安全带，将座椅靠背和小桌板恢复到完全直立并锁定的位置。

It also tells you to " return your seatback and tray tables into the full upright and locked position." Couple of different phrases or words here, first of all, " seatback."

它还告诉您“将座椅靠背和托盘桌恢复到完全直立和锁定的位置。 ” 这里有几个不同的短语或词， 首先是“座椅靠背” 。

To avoid having your groceries shift around your vehicle on your ride home, causing a mess, feed a bungee cord through the handles of each bag and keep them in their full and upright locked position.

在购完物回家的路上为了防止购买的杂物四处乱跑，混乱一片，请把每只塑料袋的把手内串一根橡皮筋装满每个袋子，让它们竖直向上锁定好位置就行啦。