如果没有升级和新的技能力，桥梁、道路和电力系统就无法应对不断增长的人口数量。
Without upgrades and new capacity, bridges, roads and power systems are unable to cope with expanding populations.
数量不断增长的大象需要更多的空间和食物来生存。
The growing population of elephants need more space and food to live.
由于苹果应用商店和安卓市场中应用程序的数量都在不断增长，对用户来说，挑选适合自己的那一款应用绝非易事。
As the number of applications in Apple's app Store and the Android Market grows, finding the right one can be tricky.
应用推荐