1·首先，文字大概发明于5500年前。
First, came the invention of writing, probably about 5500 years ago.
2·根据世界自然基金会表示，全球的黑犀牛数量已下降至5500头，使犀牛处于“极度濒危”状态。
According to the World Wildlife Fund, the global black rhino population has dropped as low as 5500, giving the rhinos a "critically endangered" status.
3·据悉，新闻工作者们窃听了5500多人的电话。
Journalists are known to have hacked the phones of up to 5500 people.
4·运行5500个测试用例目前需要21分钟。
5500 tests currently run in 21 min.
5·同样在5500新的是一个真正的硬线绕行。
Also new on the 5500 is a true hard-wire bypass.
6·丝绸和丝织品至少在5500年前就出现了。
Silk and silk fabrics emerged at least 5500 years ago.
7·目前，在全中国大约有5500名员工。
Till now, we count approximately 5500 employees in P. R. c.
8·我们现在可以大量供应优质收到基5500大卡的煤炭。
We can now Supply you large high-quality of coal-based 5500 kcal (ARB).
9·另外，5600的键盘也比5500的键盘更容易使用。
In addition, the 5600's keyboard is slightly easier to reach than the 5500.
10·确保紫外线杀菌消毒灯管工作寿命大于5500小时。
Ensure that the UV disinfection lamp life of more than 5500 hours of work.