a flat surface used for sitting or sleeping; the bottom of a cart

Ahead of the class; A cut above the rest

Without breaking a sweat; Effortlessly

To have someone wipe the floor with you

A lone wolf

a sandpiper and clam

fulfilled; satisfied

Some see the glass as half empty, others, half full

To kill two birds with one stone

foreign barbarians

To be unable to sit still; To be fidgety

① to avoid and despise ② to take care of

Spare the rod, and spoil the child

virtuous and caring