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