1. simmer down（落ち着く、気を静める）
= Simmer down, you two!
2. boil down to（結局～である）
= The problem boils down to lack of money.
3. bail out（～を救済する）
= The bank was bailed out by the government.
4. scrape by on（～で何とか暮らしていく）
= More and more people are scraping by on welfare.
5. vouch for（～を保証する）
= I can vouch for his integrity.
6. shell out（～を渋々出す）
= He shelled out $800 for car repairs.
7. patch up（修復する）
= He wants to patch things up with his wife.
8. hinge on（～にかかっている、～次第である）
= The success of the project hinges on support from the community.