As an example, the activity of SOS in our example model can only increase if either Grb2 activity increases or ERK activity decreases.
Pockets of intestinal cells, for example, can only hold a few cell generations.
German soldiers, for example, can only be used in a noncombat role in the relatively peaceful north.
Right-wing legislators, for example, can only boycott Congress for so long before they start to look foolish.
The Hackney Picturehouse, for example, can only shoehorn three showings in one day as opposed to four for Inside Llewyn Davis (a more conventional 105 minutes).
America should make it easy for the EU to admit defeat by offering it some face-saving sops, rather than forcing the EU into a corner.Europe's example can only encourage others to defy the WTO too.
Never mind that there are no direct flights from the United States (travelers from New York, for example, can only get there with a layover in London or other European capitals) or that most of Qatar's estimated 400,000 visitors last year were oil executives, sales representatives or soldiers.
The Axumite monastery of Debre Damo, for example, can only be reached by climbing up a 15m leather rope.
Specific health care products exhibiting a particular rheological behaviour at very high protein content, for example, can only be realised by targeted modification of their supra-molecular structure.
Adaptation to irregular geometries, for example, can only be achieved with additional mechanical complexity, which makes these devices often very expensive, prone to failure, and maintenance-intensive.
