A good tip is to pick people out and look at them for around five seconds. Not looking at the audience gives the impression that you're either not interested in them or terrified of them.
一个很好的建议是挑一些人，看着他们大约五秒钟。不看观众会给人留下这样的印象：你要么对他们不感兴趣，要么对他们感到恐惧。
When it notices a change, it can look at the new selection and change its text, tool tip, and enabled state to reflect that.
当它注意到变化时，会查看新的选择并更改它的文本、工具提示和启用状态来反映这一变化。
Tip: If you need help figuring out the where the hidden tiger in the previous image is, try taking a closer look at the stripes on the back of the tiger.
提示：如果您需要帮助来搞清楚前面图片中隐藏的老虎在哪儿，尝试对着老虎背上的条纹仔细看看吧。
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