龙潭虎穴: a chasm for dragon to hide or a cave for tigers to have their lair; a dragon's pond and a tiger's cave -- dangerous places; a dragon's pool and a tiger's den -- a danger spot; a hazardous
lair: 短语和例子lair1n.1.兽窝，兽穴，兽窟。2.〔英国〕(送家畜到市场时路上给家畜休息用的)围栏。3.(人的)休息处，常去处躲藏处。短语和例子〔苏格兰语〕墓地〔古语〕床。 the pirate's lair 海盗的巢穴。vi.(兽)进窝，在洞穴里睡。vt.1.把(兽等)赶进窝里；把(家畜等)关进围栏里。2.把…作为洞穴；给…设洞穴。n.〔苏格兰语〕 泥潭，泥沼。vt.使陷
