2. Obviously nearly 20 hour's flights add on 2 hours the high strength trainings, lets Lu appears somewhat exhausted especially. 显然近20个小时的飞行加上2个小时的高强度训练，让阿鲁尤显得有些疲惫。
3. LU Hong senior fluid control experts say, coal to the steel industry is a very important and an essential mineral raw materials. 鲁宏的资深流体管专家透露，煤对钢铁工业来说是一项非常重要而不可缺少的矿物原料。
英英解释
n.
1. a trivalent metallic element of the rare earth group; usually occurs in association with yttrium
