ref
bibtex 格式裏的booktitle：會議名稱的年份和縮寫應去掉， e.g.,
2019 2th International Conference on Internet of Things, Embedded Systems and Communications (IINTEC)
可簡寫爲：
International Conference on Internet of Things, Embedded Systems and Communications
fig
一行多個圖，圖僅僅並列
一行多個圖，多圖共用一個label，以小標題顯示
table
換行
跨行