既然这样，它是代表尊敬或敬重。

In this case it means respected or esteemed.

既然这样, 延长寿命就要重于繁衍后代.

In this case, prolongation of life should trump reproduction.

既然这样，在老建筑被拆除之前，我们应该针对建筑质量及住户情况做更多的调查和评估。

In this case, for my understanding, before the structures are torn down, there should be some evaluations of the qualities and the people living in them should be involved.

既然这样, 我们也只好不管他,自行处理这件紧急事件了.

In that case, we have to do without him and handle this emergency on our own.

埃里克：既然这样，也帮我挑选一顶吧。这顶棒球帽怎么样？

Eric: In that case, help me pick one out. How about this baseball cap?

既然这样，为什么我会热衷于跳伞呢？

So why the whole skydiving thing?

店员：既然这样，我大力推荐这一件。它只超出您的预算五元，而且物超所值。

Clerk: In that case, I strongly recommend this one. It's just five dollars over your limit and is worth every penny of it.

姑妈既然这样好, 你干脆去了别回来. ”

Since your aunt is so wonderful, you might as well just go over there and stay.

既然这样,那么你为什么不去想个补救的办法.

And you sit there, tearing your hair , instead of seeking to remedy your condition.

既然这样，我们为什么不放弃一次性筷子的生产呢？

If so, why do we not abandon the production of disposable chopsticks?