用法:
1 sticky substance that oozes esp from fir and pine trees and is used in making varnish, medicine, etc 树脂（尤指冷杉树脂和松脂）.

用法:
2 similar substance made synthetically, used as a plastic or in making plastics 合成树脂.

• opposite(in front of)
• or else(or, otherwise)
• or(nor)
• ought to(should)
• out and out(through and through)
• out of bounds(out of all bounds)
• out of line(out of one's line)
• out of mind(out of one's mind, out of one's right mind)
• out of one's way(out of the way)
• out of place(out of the way)
• out of question(out of the question)
• out of regard for(without regard to)
• out(outside)
• out-of-work(out of work)
• outdoor(outdoors)
• outside(within)
• over(over with)
• over(through out, through)
• overlook(oversee)
• oversea(overseas)
• pain(pains)
• part from(part with)
• part(some)
• partly(partially)
• pass one's eye over(run one's eye over)