- outwardly fierce as a bull but inwardly timid as a mouse br>
- 表面上: superficial; ostensible; see ...
- 气壮如牛: fierce as a bull; as tough a ...
- 实际上: in fact; in reality; actuall ...
- 胆小如鼠: as timid as a mouse; as timi ...
- 表面上气壮如牛实际上胆小如鼠: outwardly fierce as a bull but inwardly timid as a mouse
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