naturalbarrier;天险
havenotenabledefenceposition;bestrategicallyindefensible无险可守
runarisk;冒险
beoutofdanger;脱险
dosth.attheriskofone'slife;干险事
Thatwasanearthing!好险哪!
sinister阴险
comewithinanaceofdeath险遭不幸
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