您要查找的是不是：
- 富足左C-lpp半群abundant left C-lpp semigroup
- C-lpp半群C-lpp semigroups
- lpp半群lpp semigroup
- 弱左C半群left C-semigroups
- 左C-半群Left C-semigroups
- 左C-EhresmannWeakly left C-semigroups
- 左C-rpp半群left C - rpp semigroup
- 六点半half past six
- 他养了一群羊。He keeps a flock of sheep.
- 玛丽拉了拉控制左舵的绳子。Mary pulled her left rudder string.
- 他喀嚓一声将棍子折成两半。He snapped the stick in two.
- 流星群meteor swarm
- （口令）右[左]转弯走！Right [left] wheel!
- 那旗帜降了半旗。The flag was flown at half-staff.
- 一群暴民闹事反对市政府。A mob was rioting against the municipal government.
- 他们在半年内盖好了这幢房屋。They finished the house within half a year.
- 那些孩子像一群羊一样挤在一起。The children huddled together like a flock of sheep.
- 人脑从中央垂直地分为两半球。The human brain is divided vertically down the middle into two hemispheres.
- 这些商店晚上九点半打烊。The stores shut at 9:30 p.m.
- 约翰是这群人中的佼佼者。John is the best of the bunch.
