provide for somebody = to give somebody the things that they need to live, such as food, money and clothing “供养”，例如：

　　She has three children to provide for.

　　He didn't provide for them in his will (= did not leave them any money).

　　It's hard to make enough money to provide for such a large family.

　　They agreed to provide for the child's education.

　　roll up your sleeves = to prepare to work or fight 跟中文里的“撸起袖子干活”一个感情色彩。例如：

　　It's time to roll up our sleeves and get the job done.

　　tear apart = to make people in a country, an organization or other place fight or argue with each other，“拆散”，例如：

　　Racial strife is tearing our country apart.

　　hold something together = to remain, or to keep something, united，“使团结，使凝聚”例如：

　　A political party should hold together.

　　It's the mother who usually holds the family together.

　　The coach hopes to hold the team together for at least one more season.

　　The box was held together by a strong glue.

　　大家如果仔细往下继续看，一定会发现更多有用的地道表达，加油!