One chilly night when I was hiking in the Rocky Mountains with some students, I mentioned that we were going to cross a mountain stream.
一个寒冷的夜晚，当我和几个学生在落基山脉徒步旅行时，我提到我们将要渡过一条山间小溪。
You should learn from insects when they try to cross a wall, they fall down again and again until at some time they get success.
你应该向昆虫学习，当它们试图越过一堵墙时，它们会一次又一次地倒下，直到某个时候它们成功了。
But when they cross a busy road by using a zebra crossing, the traffic is held up.
但是当他们利用斑马线通过繁华的马路时，交通就被阻碍了。
To combat the growing problem, Ensalaco said in late October the U.S.Federal Bureau of Investigation (FBI) initiated Operation Cross Country IV, a nationwide crackdown on human trafficking.
VOA : standard.2009.11.13
She proceeded to fairly rapidly go down the list, with minimal explanation, placing next to each item either a check (good) or a cross (bad).
FORBES: How To Make Year-End Performance Appraisals A Constructive, Not Demotivating, Event
Last week, the Obama Administration announced that increasing the number of students who receive undergraduate degrees in science, technology, engineering, and math (STEM) by 1 million over the next decade has been formally designated as a Cross-Agency Priority (CAP) goal one of a limited number of such articulated goals designed to focus cross-agency coordination and encourage sharing of best practices among agencies with complementary missions.
Congo's has a catanga cross (a large copper cross), while Equatorial Guinea has a pair of cowrie shells.