1.Gardening is my bread and butter right now.

眼下园艺工作是我的谋生之计。

During the Great Depression, many people couldn't find their bread and butter.

经济大萧条期间，许多人都找不到生计。

bread and butter:

That which is central or fundamental, as to one's business, survival, or income; a staple or cornerstone.

Derived terms:

bread-and-butter

bread-and-butter pickle

bread-and-butter note

bread-and-butter issue

bread-and-butter letter

bread and butter pudding

2.He almost had an urge to jump ship when he got in trouble, something that was once trivial.

当他遇到微不足道的小麻烦时，他就很想跳槽。

When the company announced that it was losing money, many employees jumped ship.

当公司宣布开始赔钱时，员工纷纷跳槽。

jump ship:

(idiomatic) To leave something, especially suddenly or rapidly.

3.He got canned from his job for stacking off too much.

他总偷懒，被解雇了。

can:

(US, euphemistic) To fire or dismiss an employee.