1. by all means 尽一切办法,务必
（1）Do it, by all means, but strictly on the quiet.
（2）Try by all means to save the dying.
2. by and by 不久,迟早
（1）By and by electricity will take the place of coal.
（2）Summer vacation will come by and by.
3. by chance 偶然,碰巧
（1）He works always by rule and line, never by chance or guess.
（2）I got this book by chance at a second - hand bookshop.
4. by far 最,...得多
（1）He is by far the best player on the team.
（2）This applicant is by far the better than that one.
5. by hand 用手,用体力
（1）We received a typewritten letter with a note added by hand.
（2）The dish was made of silver, beaten out by hand.
拓展：at hand/in hand/on hand/by hand
I haven't my book at hand. 我的书不在手边。
He believes that the great day is at hand.
I have enough data in hand.
The situation is now in hand.
The printing of the book is now in hand.
There weren't enough snacks on hand for the party.
We have nobody on hand to repair your car.
I always like to keep a certain amount of money on hand.
clasp sb. by the hand
He clasped his old friend by the hand. 他紧紧地握住老朋友的手。