fortification

n.

筑垒，设防；防御工事；

复数：fortifications

1. In the distance the fortification of an Afghan army and police post was visible.
   远处，可以看到阿富汗政府军的防御工事和警察的据点。

Folic acid fortification.
Iron Fortification of Rice Seed by Soybean Ferritin Gene
Iron fortification of rice seed by the soybean ferritin gene.
Folic acid intake from fortification in United States exceeds predictions
Vitamin D fortification in the United States and Canada: current status and data needs.
Impact of Folic Acid Fortification of the US Food Supply on the Occurrence of Neural Tube Defects
The effect of folic acid fortification on plasma folate and total homocysteine concentrations.
Reduction in neural-tube defects after folic acid fortification in Canada.
A Temporal Association between Folic Acid Fortification and an Increase in Colorectal Cancer Rates May Be Illuminating Important Bio...
Biochemical indicators of B vitamin status in the US population after folic acid fortification: results from the National Health and...