A selective process applies only to a few things or people.
Selective breeding may result in a greyhound running faster and seeing better than a wolf.
选择育种可能会培育出一种比狼跑得更快、视力更好的灵缇。
When someone is selective, they choose things carefully, for example, the things that they buy or do.
Sales still happen, but buyers are more selective.
销量仍在,但买家更挑剔了。
If you say that someone has a selective memory, you disapprove of the fact that they remember certain facts about something and deliberately forget others, often because it is convenient for them to do so.
We seem to have a selective memory for the best bits of the past.
我们似乎对过去最美好的时光有选择性的记忆。