副詞 by far:

1. by a considerable margin
   同義詞：far and away, out and away

1. It is quicker by far to go by train.
   乘火車要快得多。
2. I've seen some slow workers in my time but this lot are the slowest by far.
   我以前倒也見過一些笨工人，但是這群人可算是最笨的了。
3. She is the best by far/She is by far the best.
   她顯然是最好的。
4. The TV tower is by far the largest construction of our country.
   電視塔明顯地是我國最大的建筑。