The bases pair up, forming hydrogen bonds, and the DNA forms a twisted shape that is known as a double helix.

碱基配对，形成氢键，DNA 形成扭曲的形状，被称为双螺旋结构。

And here on Earth, amazing experiments are being done to try to create life from scratch, life that might be very different from the DNA forms we know.

并且在地球上，人们在做一种神奇的实验，去寻找随机创造出的生命，而且它们的DNA会跟我们有很大不同。

Propagation of the host organism containing the recombinant DNA forms a set of genetically identical organisms, or a clone. This process is hence known as DNA cloning.

宿主和载体。