Prokaryotes lack organelles such as nucleoli, mitochondria, plastids , Golgi apparatus, and do not exhibit cyclosis. 原核生物无细胞器,如核仁 、 线粒体 、 质体 、 高尔基体等, 不出现胞质环流.
There was a scream of brakes from the carriageway outside.外面车行道上传来刺耳的刹车声。His mouth was a little open, as if he'd started to scream.他的嘴微微张开,似乎是要开始尖叫.Lou prattled on about various trivialities till I wanted to scream....