B: Not very long. I arrived here on the dot.
对不起，我迟到了。你到这儿很长时间了吗。
Duck Hepatitis B Virus(DHBV) was tested in duck serum in Lanzhou area by DNA dot blot hybridization.
用血清斑点分子杂交法检测兰州地区饲养的鸭群。
Dot blot indicates that the fibroin gene has integrated into the genome of B. mori.
分子杂交实验证明天蚕丝素基因已整合到家蚕基因组中。
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