品系（strain）
异单基因近交系（Colsognic Inbred Strain）
重组近交系（recombinant inbred strain，RI）
isolation of strain（菌种分离）
Strain breeding（菌种选育）
EASE THE STRAIN ON THE STERN LINE means（）.
nbred strain animals：近交系动物
品系（strains）
菌株（Strain）
胁变（strain）
杂交群动物（Hybrid strain）
近交系(inbred strain）
Which mooring line is likely to undergo the most strain when docking a ship under normal conditions?（）
同源突变近交系（coisogenic inbred strain）
In heavy weather you notice buckling in the midships deck plating of your vessel. To relieve the strain you could（）.
cell strain（细胞株）细胞株：
重组同类系（recombinant congenic strain，RC）
Proper filtering and straining of fuel oil is important because the （）.
重组近交系（recombinant inbred strain RI）
The greatest strain，when lifting a load with the jumbo purchase，is on（）.
同源导入近交系（Congenic inbred strain）
The pressure ________ causes Americans to be energetic, but it also puts themunder a constant emotional strain.
Exercise really can help you _______ stresses and strains more easily.
