1.recurring: if something recurs, it happens more than onece.

2. recur:v.  if something, especially something is bad or unpleasant, recus, it happens again.

                 if a number or numbers after decimal point recur, they are repeat forever in a same order.

SYN: relapse into, recrudesce

3. idiopathic: 先天性的

4. pulmonary: adj. relating to the lungs or having an effect on the lungs.

pulmonary tuberculosis: 肺结核

pulmonary artery: 肺动脉

5. fibrosis: the formation of an abnormal amount of fibrosis tissue in an organ or part as the result of inflammation, irritation, or healing.

6. carnivorous: carnivorous animals eat meats.

                        carnivorous can be used, especially humorously, to describe someone who eat meat.

7. peril: grat danger, especially of being harmed or killed.

in peril

great/grave/serious peril

[usually plural] a danger or problem in a particular activity or situation.

the perils posed by mountainerring.

the perils of the sea.

8.menace: something or someone is dangerous.

                 a threatening quality, feeling, or way of behaving.

                a person, especially a child,who is annoying or causes troubles.

the growing menace of oil pollution at the sea.

mence of/ to

air/ sense of menace

9. touchstone: something that provide a standard against which other things are compared and/or judged.

10.lore: knowledge or information about a subject, for example nature or magic, that is not written down but passed from person to person.

11. if you muse on something, you think about it, usually saying or writting what you are thinking at the same time.

a goddes that inspires a creative artist, especially a poet.

musing over: 冥想， 沉思

12. premise: {plural}premises the buildings and land that a shop, restaurant, company etc uses.

13. furnace: a large container for avery hot fire,used to produce power,heat or liquid metal.

14. clang and clank: 叮当声

15. the quality of expressing something in a very few word.

      the quality of continuing for only a short time.

16. propel: to propel something in a paticular direction means to cause it to move in that direction.

-peopelled conbines with nouns to form adjectives that indicate how something, something especially a weapon, is propelled.

17. cresent: a curved shape that is wider in the middle and pointed at the ends. a cresent moon.

the curved shape that is used as a sign of the Muslim religion.

a street with curved shape- often used in the name of streets.

18. clamor: a loud harsh or strident noise

                  loud and persistent outcry from many people.

                 make loud demands