dangerous and difficult

For northern communities the most difficult and dangerous time to travel in the wild is early and late winter when the ice is forming or beginning to break up.

对北方居民来说，在荒野里远行最艰难、也是最危险的时期是初冬和暮冬，也就是河水结冰和冰层开始融化的时候。

When a market's gotten away and you've missed the first leg you should still consider jumping in even if it is dangerous and difficult.

若是市场已经起步了而你错过了第一轮狼烟，你不妨仍然考虑半途介入，即使如许做是危险而坚苦的。

Now it is a critical and difficult technical point to establish suitable tidal current model, migration and diffusion model, and then forecast the action of leakage dangerous chemicals accurately.

目前建立适宜的流场和扩散模型，对泄漏危化品行为进行准确地预测预报是关键技术难点。

Old people, however, may find it a little difficult climbing up and down the steps, but it is still much safer than walking across the road with all the dangerous of moving traffic.

然而,老年人上下台阶可能有点困难,但比起在危险的车流间横穿马路还是安全得多。

Getting there was difficult and dangerous, but the room itself was sanctuary.

到屋里的路程困难又危险, 可那屋子却是避难所.

Results Fetal hypoxia, birth injury, premature, postmature pregnancy, huge baby, difficult vacuum extraction, forceps operation and breech extraction were the most dangerous elements of intracranial haemorrhage of newborn.

结果：新生儿颅内出血与胎儿缺氧及（或）产伤有关，早产、过期妊娠、巨大儿、困难的胎吸、产钳术、臀位助产术是颅内出血的高危因素。

It is a very complex operation, which is often dangerous and difficult, " he says. "

这是一项非常复杂的业务, 往往危险而又困难.

Fire Elementals are difficult to harm and dangerous to be near.

火元素很难被伤害,而呆在火元素附近则非常危险.