This list is composed of Chinese Mandarin speech particles that often could be omitted whilst the sentence still understood. That is not to say though that they are useless, quite the opposite, these sounds add flavour, context, and a depth of meaning. They regularly come up in speech, online and in text messages. Many of them can be said with different tonal values and therefore often have more than one meaning. If used correctly in natural conversation they will make you sound more like a native speaker.