The phrase 'constant features' is correct and usable in written English
The phrase implies that something remains unchanged or remains in the same state. For example, "One of the constant features of the landscape is the majestic mountains in the distance."
On the streets of Srinagar, blood and guns have been such constant features that the prospect of war hardly meets with outrage or panic.
To the south of Lough Neagh lies a rich orchard country, and apple growing and market gardening are constant features of the landscape.
The dirigible, a white 117-foot-long surveillance balloon called an aerostat by the military, and scores more like it at almost every military base in the country, have become constant features of the skies over Kabul and Kandahar, and anywhere else American troops are concentrated or interested in.
It started with a story by Graham Bowley, who wrote about spy dirigibles, white surveillance balloons, called aerostats by the military, which have become constant features in the skies over Kabul and Kandahar, and anywhere else American troops are concentrated or interested in.
Remove any constant features (there were none).
One attempt to account for the variation in these cases is to invoke Fregean modes of presentation of the constant features.
Corruption scandals are a constant feature of Brazilian politics.
In Bush's telling, the non-decision decision is a constant feature of his Presidential policymaking.
In the decades after Lincoln, Shakespeare productions were a constant feature of frontier life in the west.
The hunger for a better future remains a constant feature of the American sociopolitical landscape.
People-smuggling is a constant feature of times of conflict; so is treason.
