您要查找的是不是：
- Host-plasmid balanced lethal system 抗药性基因
- Expression Plasmid-Host Strain Using Chromosome-plasmid Balanced Lethal System Based on the Escherichia coli thyA 通过大肠杆菌thyA染色体-质粒平衡致死系统构建无抗性基因表达载体
- Construction and Application of crp, asd Deleted Mutants Host-Vector Balanced Lethal System of Salmonella Choleraesuis C500 Strain 猪霍乱沙门氏菌C500株crp、asd缺失株平衡致死系统的构建及应用
- balanced lethal system 平衡致死系统
- Sex-linked and balanced lethal line 性连锁平衡致死系
- Sex-linked and balanced lethal lines 性连锁平衡致死系
- Sex-linked balanced lethal strain 性连锁平衡致死系
- X-linked recessive lethal system X-染色体隐性致死系统
- I suppose you also have a caste system in your society. 我想你们的社会里也有一种等级制度。
- The right to dissent is part of our political system. 有持异议的权利是我们政治体制的组成部分。
- Pot-holes can be lethal for the unwary cyclist. 路上的坑坑洼洼骑车的人一不小心就有致命危险。
- Do you know how to log in to the system? 你知道怎么登录进入这个系统吗？
- Public opinion was against the old feudal system. 公众舆论反对旧的封建制度。
- The system works on the principle that heat rises. 该项装置是按照热力上升的原理运转的。
- The drainage system has been aged. 排水系统已经老化了。
- They called for a radical reform of our tax system. 他们要求对税收制度进行根本改革。
- A balanced diet provides nutrition for your body. 均衡的食物使你的身体获得营养。
- This is a highly efficient new heating system. 这是个高效的新取暖系统。
- He cast and balanced till midnight. 他算帐算到半夜。
- The dolphin balanced the ball on its nose. 海豚用鼻子顶着球，使其保持平衡。
