A more formidable barrier is the Defense of Marriage Act, passed in a previous Congress, which denies gays who are married, and any children they have, the right to federal benefits.
Kootenai Falls, which drops some 90 m within a run of a few hundred meters, forms a natural boundary between fishes of the upper and lower river, but Libby Dam, several kilometres upstream, is an even more formidable barrier.
But the more formidable barrier now facing the lawsuit is a procedural rule.
The rolls of wire will in due course be replaced by ever more formidable barriers, just as the barbed wire dividing East and West Berlin became a concrete wall in 1961, only to fall in 1989.
"The sim in the mobile was basically like an ID card and mobiles were much easier to access than opening a bank account, a process that had far more formidable barriers to entry".
A philosophical challenge constituted a more complex barrier.
What would constitute a more French style?
R-M systems also constitute a formidable barrier to efficient DNA transformation for genetic manipulation, especially DNA from other genera, most notably, E. coli.
In addition to performing symbiotic physiological functions for the host (eg, assisting in digestion, producing vitamin K and biotin, and promoting maturation of the mucosal immune system) [ 49– 54], the microbiota constitute a formidable barrier that confronts pathogens [ 49– 54] 54].
The monopolies granted by the king form a standing grievance to our merchants in British Burma, and constitute, in some eyes, almost a more formidable indictment against him than is supplied by the constantly recurring massacres.
Nevertheless, the Sahara always constituted a formidable barrier to the movement of technology and peoples.
