Cut out magazine reading and most book reading (unless it's essential) to give you some extra time.
不要读杂志和大部分的书(除非是重要的)会让你有多余的时间。
2
Dessert is not seen as an essential part of the meal, but as something extra.
但甜食并不是正餐的重要部分，也不是每餐必备的，只是附加的。
3
Providing the ability to use a keyword argument is not essential, but it can make code with lots of arguments a lot clearer, and is not much extra work.