14. I believe mountaineering is really beneficial.
我相信登山是很有益处的。
还能这样说：
I think we can get a lot from mountaineering.
I am of the opinion that mountaineering is helpful.
谚语：
Believe not all that you see nor half what you hear.
眼见的不能全信，道听途说的更不能信。
15. I am for the hills this vacation.
我赞成今年休假去爬山。
还能这样说：
I agree with the idea that we will climb the mountain this vacation.
I approve of climbing the mountain this vacation.
应用解析：
a hill of beans 没有多大价值的东西；
as old as the hills 古老的；
over the hill 巅峰期已过；
up hill and down dale 到处
16. The mountaineers ran into a snowstorm.
登山运动员遇上了暴风雪。
还能这样说：
The mountaineers came across a snowstorm.
The mountaineers met a snowstorm.
应用解析：
be run off one's feet 非常忙碌；
the run of 自由参观或使用；
run across 偶然遇到；
on common run of 普通类型的；
on the run 逃走，躲藏，匆匆忙忙；
in the short run 近期内，不久
17. Burdened with so much equipment, I climbed with difficulty.
我背着这么多的设备，登山很吃力。
还能这样说：
Too much equipment made it difficult for me to climb.
I had difficulties in climbing because of too much equipment.
应用解析：
the burden of sth. 常说等的主题、要点；
burden oneself with something 加负担于自己
18. They laughed at my puny efforts at rock-climbing.
他们取笑我在攀岩活动中的那可怜劲儿。
还能这样说：
They made fun of my puny efforts at rock-climbing.
They mocked at my puny efforts when I climbed the rock.
应用解析：
laugh sth. away 以笑消除不快等；
laugh sb. down 用轻蔑的笑声止住某人的声音或驳斥某人；
laugh sb. out of sth. 使某人发笑以忘掉其问题等