This room is twice the length of the kitchen.

这个房间的长度是厨房的两倍。

《牛津词典》

The street is twice the length of that one.

这条街是那条街的二倍长。

youdao

This room is twice the length of the other, but much narrower.

这个房间的长度是那个房间的两倍，但窄得多。

youdao

The dinosaur had a very long tail, up to twice the length of its body.

BBC: News | Sci/Tech | New dinosaur discovered in England

American MBA programmes are typically twice the length of those in Europe, making both the cost and the opportunity cost of studying there higher.

ECONOMIST: Business education

Two control lines, generally 60 to 90 feet long, lead from the sides of the kite down to a padded bar about twice the length of a water-ski towrope handle.

FORBES: Hook In and Hold On