Just then, Ms Miles, the gym teacher, brought out a bunch of short jump ropes.
就在这时,体育老师迈尔斯女士拿出了一捆短跳绳。
I have two jump ropes, one long jump rope and one short jump rope.
我有两个跳绳,一根长的,一根短的。
With a short rope, she could jump 100 times without missing.
用一根很短的绳子,她可以跳100次而不失手。
A primer is a short RNA sequence or DNA sequence that gets sort of the process of replication jump started, and that's just because of the biological properties of DNA polymerase that that primer's needed.
引物是一段短的RNA或者DNA序列,引物是整个复制的起点,因为DNA聚合酶的,生物特性,引物在复制过程是必不可少的
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