First, read the English article below.

Direct sound effects are things like voices, weapons noises, and item interaction sound effects. You'll want to make sure you have these in and that they make sense within your game. Try to get as many unique ones as possible, since too many of the same makes your game sound repetitive (giving you a bad case of "Then I Took an Arrow to The Knee" syndrome). Ambient sound effects are background noises, usually environmental. These are important as they help set the scene and make your players feel immersed in the game, so don't neglect them. When you're doing the sound work, it's a good idea to try to record as much original sound as possible. You can use a sample library, but people that know what they're doing will notice and it will come across as unprofessional. Music is also important to the game and you shouldn't forget about it. Sometimes, a soundtrack is all that's necessary to make a game really stand out, even if it's otherwise an unknown. Hire someone that knows what they're doing and use your soundtrack to help create an immersive player experience. 

Now, please write a short abstract for it in Chinese. Abstract:
创建直接音效。 创建背景音效。 尽量用原创音效。 不要忘了音轨。