1. Polls show Bush and Kerry in a tight race, and both campaigns are focusing on national security to try to gain an advantage.
2. It will try and use the fewest possible resources to gain a sustainable development.
3. Some other experts urged that pregnant women not try to gain less weight than recommended.
4. Try to gain access to tall buildings or rooftops and wait to be rescued.
5. Bashing China to gain business or votes is understandable, but those who try it are likely to shoot themselves in the foot.
6. One main reason countries try to manipulate currency is to gain a trade advantage.