例句與造句

1. And billions are being invested in new or upgraded towers using different standards.
2. Like other tower defense games, upgrading towers is very important to play well.
3. Resources are used to build and upgrade towers which can be sold again at a loss.
4. Killing enemies earns resources, which can be used to build more towers and upgrade towers toward two stronger levels.
5. This mode also includes a Sandbox option, which starts off the player with 10, 000 coins and a speed boost of adding and upgrading towers before sending the endless waves of aliens.
6. It's difficult to find upgrading tower in a sentence. 用upgrading tower造句挺難的