这意味着仅剩下4％的长叶松木。

This means that there is only 4% of longleaf pine remaining.

youdao

所以你们可以看到在杂化轨道里,我们上面,由很大的一叶相长干涉。

So you see in the hybrid orbital we actually have a larger lobe on top where they constructively interfered.

youdao

成花素达到一定水平，产量就会提高，因为它指令植物停止长叶，开始孕育结出果实的花。

With the right levels of florigen yields increase because it instructs plants when to stop making leaves and start making flowers, which in turn produce fruit.

youdao

And it turns out that when you constructively have two p orbitals interfere, and when I say constructively, I mean they're both either positive or they're both the negative lobes, that's when you got bonding.

当两个ｐ轨道,相长干涉时，我说的相干相长，意思就是说它们要么都是,正的叶瓣要么都是负的叶瓣，这时就能成键。

麻省理工公开课 - 化学原理课程节选

You can see if we combine the s with the top lobe of the p, they're going to constructively interfere because they have the same sign.

你们会看到如果我们把s轨道和p轨道的上叶结合，它们是相长干涉,因为它们负号是相同的。

麻省理工公开课 - 化学原理课程节选