The security door is so firm that nobody can break in.

防盗门这么结实，没有人能闯进来。

youdao

Han Jia, this bridge isn't so firm, swinging from side to side.

韩佳，这座桥怎么这么不稳啊，还左右晃悠。

youdao

Everyone agreed with me, so I knew I was on firm ground.

每个人都同意我的意见，所以我知道自己立场稳固了。

《牛津词典》

So,first of all, let me assert my firm belief that the only thing we have to fear is fear itself-- nameless,unreasoning,unjustified terror which paralyzes needed efforts to convert retreat into advance."

VOA: special.2011.03.17

So Firm 1 would be producing half its monopoly quantity and Firm 2 would be producing half its monopoly quantity.

即公司1生产垄断产量一半的商品,公司2也生产垄断产量一半的商品

耶鲁公开课 - 博弈论课程节选

So I moved around at a couple of law firms. I started at a law firm in the South.

所以我跑了一些律师事务所。我开始在一家南方的律师事务所做事。

选康内尔大学的理由 - SpeakingMax英语口语达人

As clay is not so firm underfoot as hard courts, twisting and turning is harder.

BBC: Clay brings tension to surface

So firm, in fact, that a correction next week could be a time to buy, writes MoneyShow.com senior editor Tom Aspray .

FORBES: The Week Ahead: Will Stocks and Rates Continue Higher?

The fairways were so firm that tee shots were running some 50 yards after they landed, and the greens were firm enough that balls ran out an extra two feet around the hole.

NPR: Haas Shoots 64 To Take Lead At Riviera