add up
... take action采取行动;开始工作 adapt to适应 add up加起来;说得通 ...
make sense
... lead to导致,通向 make sense有意义,说得通 apart from除…之外,此外 ...
To hold water
... water over the dam:木已成舟,既成事实 to hold water:(理论、计划等)证明合理,说得通 throw cold water:泼冷水 ...
That explains it
in plain English
he speaks putonghua quite correctly