bound nucleus中文什么意思

《英汉医学词典》bound nucleus

束缚核

• at a bound:    一跃, 一跳
• be bound by:    受约束; 受...约束；由...联系 ...
• be bound for:    去…地方; 以……为目的地; 准备到 ...

例句与用法

1. they lack well-defined membrane-bound nuclei and histone-coated chromosomes, and do not contain complex organelles such as chloroplasts and mitochondria
   它们缺少由细胞膜包围的细胞核，没有结合组蛋白的染色体，也没有类似于叶绿体及线粒体这样复杂的细胞器。
2. many, though not all, terrestrial prokaryotes ( simple one-celled organisms such as bacteria that lack a membrane-bound nucleus ) and eukaryotes ( organisms with well-defined nuclei ) could survive this temperature range
   地球上许多原核生物（简单的单细胞生物，没有细胞核结构，如细菌）与真核生物（有清楚细胞核结构的生物）都能存活于前述的温度?围内。