In the first tip, I demonstrated how to select the background of an icon.
在第一个技巧中，我演示了如何选择一个图标的背景。
Photo tip: Add layers to your composition-that is, multiple elements beyond the main subject, such as foreground and background elements.
拍照小技巧：给你的构图分层——也就是说，给拍摄主体添上多种元素，例如前景和背景元素等。
Tip: Some people work best with low-volume background music.
小贴士：有些人工作时放些低声的音乐会工作得更好。
Tip: do not ever use a Gradient Layer for backgrounds, because when increasing the height of the canvas (a very common practice in web design) the background gets distorted.
提示：永远不要在背景上用渐变图层，因为当调整画布的高度时(网页设计时很常见的做法)，背景会被扭曲。
Tip: to test if the small pattern is integrated in the background pattern, you can make its layer invisible and then visible again.
提示：测试对齐背景图案的小图案，可以使这一层隐藏，然后再次可见。
Though deviations to this tip exist, using upbeat music as a background or focus tends to grab the viewer's attention and raise the excitement.
使用欢快的音乐作为背景音乐或者焦点常常能捉住观众的注意力和提高他们的兴奋度，虽然这个建议有一点偏题。
I come from an Arts background and the most complicated math I do is calculating how much tip I have to leave at the end of a meal.
我来自一所有艺术背景的院校，我做过的最复杂的数学就是吃完饭后算算我应该付多少钱。
BACKGROUND and AIM: We studied the mutation effects of sodium sulfite and sodium nitrite in root tip cells of Vicia faba.
背景与目的：研究亚硫酸钠和亚硝酸钠对蚕豆根尖细胞的致突变作用。
BACKGROUND and AIM: We studied the mutation effects of sodium sulfite and sodium nitrite in root tip cells of Vicia faba.
背景与目的：研究亚硫酸钠和亚硝酸钠对蚕豆根尖细胞的致突变作用。
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