不要送剪刀、刀具或其它类似切割用的炊具，这些都有关系断交的含义。

Do not give scissors, knives or other cutting utensils as they indicate the severing of the relationship.

youdao

鲍恩的同事、伊利诺斯州惠顿学院的詹姆斯·霍弗尼尔说：“这是用锯子切割石头最古老的事例。”

"This is the oldest example of saws being used for cutting stone," said Bown's colleague James Hoffineier of Wheaton College in Illinois.

youdao

鲍恩的同事、伊利诺斯州惠顿学院的詹姆斯·霍弗梅尔说：“这是用锯子来切割石头最古老的例子。”

"This is the oldest example of saws being used for cutting stone," said Bown's colleague James Hoffmeier of Wheaton College in Illinois.

youdao

If you have DNA fragments, so this is DNA that you've cut up into fragments using restriction enzymes for example.

如果你有DNA片段,例如有一段你用限制酶,切割成片段的DNA

耶鲁公开课 - 生物医学工程探索课程节选

This gives you a biological mechanism for cutting, using restriction enzymes, and then you denature so that it falls apart, and then you renature so that it comes back together.

这是一种切割DNA的生物机制,用限制性内切酶,改变DNA的性质让它打开,然后让它合起来恢复它的性质

耶鲁公开课 - 生物医学工程探索课程节选

If I took this same restriction enzyme and tried to cut the chromosomal DNA of a sickle patient, it wouldn't cut at that point because the wrong sequence is there.

而如果我用同样的限制酶,去切割病人的染色体DNA,那该酶是不会起作用的,因为基因序列不对

耶鲁公开课 - 生物医学工程探索课程节选