e This is just base e, natural logarithm.

减去EXP自然对数中的。

麻省理工公开课 - 固态化学导论课程节选

Steppingstones carved from the natural stone base of the lake lead to two concrete gazebos, which flank the seven-bedroom, seven-bathroom house.

WSJ: High Water Marks

The cost to countries of nutrient over-enrichment from the degradation of their marine and coastal natural resource base, and the services and livelihoods it provides, will increase without improved policy responses.

UNESCO: Intergovernmental Oceanographic Commission

And that requires us to continually renew that commitment to our historic structures and our natural resource base, so that when Trevor and Olivia and those guys have their kids, when you guys have your grandkids, that that stuff is there for them, too.

WHITEHOUSE: President Obama Talks with Virginia Families on the Economy | The White House