12. locate

(1) establish in a place; situate 把放在某处
The company locates its branch office in the suburbs.
He located himself near the door.

(2) discover the exact place 定点于
You must locate where the missing is, then you can rescue him.
Can you locate where Paris is on the map?

(3) 用于be located：位于
Japan is located to the east of China.
The stock exchange house is located on Shunan Street.

13. caution

(1) vt. 警惕；提醒
The policeman said, "I must caution you that anything you say may be used against you at your trial."
He was cautioned against swimming in that rough river.
The weather broadcast cautioned us about the icy roads.

(2) n. 谨慎；小心（不可数）
Everybody speaks with great caution.
Caution: Dangerous Place!

(3) n. 警告（可数）
The prisoner was given a caution and set free.
I can see this talk is a kind of caution.

14. … and the problems the United States faced at the beginning are worth thinking about, …: 美国人在初期必须面对的问题是值得考虑的

face
(1) vt. meet resolutely
We must face our trouble and bear it.
I had to face the horrible fact that I am old.

(2) vt. confront 面临
Some refugees faced starvation and some were homeless.
Surely that is not the big issue we are facing in China.

(3) vt. confront 摆在……面前
The difficulty that faces us today is supplying food to those in need.
What problem is facing you?
We are faced with an exceptionally difficult situation.
Everybody is faced with the same problem: surviving.

(4) vt. 面对；朝着
Our house faces a park.
The husband turned and faced his wife.

worth
(1) of a value equivalent to 价值为；值得上
The watch is not worth much.
It is worth much more than I paid for it.
A bird in the hand is worth two in the bush.
An ounce of praise is worth a pound of criticism.

(2) justify or repay 值得
They thought the book worth publication.
The exhibition is really worth a visit.
The performance is worth watching, isn't it?