word-wrap: normal Default. Content exceeds the boundaries of its container. break-word Content wraps to next line, and a word-break occurs when necessary. 必要时会触发word-break。
word-break: normal Default. Allows line breaking within words. 好像是只对Asian text起作用。 break-all Behaves the same as normal for Asian text, yet allows the line to break arbitrarily for non-Asian text. This value is suited to Asian text that contains some excerpts of non-Asian text. keep-all Does not allow word breaking for Chinese, Japanese, and Korean. Functions the same way as normal for all non-Asian languages. This value is optimized for text that includes small amounts of Chinese, Japanese, or Korean.