on a ground(Spraying valves are denoted by red lettering on a white ground. Flood valves are identified by white lettering on a red ground. (Maritime Engineering Practice, p.261) BorisKap)
amid(used esp. by the media • The planned counter-offensive comes amid reports that US President Barack Obama is weighing a decision to authorise air strikes. • One of the major government-backed drives in the city is the development of a tourism industry, amid a widespread belief that Pskov's historical legacy, which has accumulated over more than 1,000 years, could be a big earner.Aelred); in the face(The Saudi coalition attacks came in the face of demands issued by the United Nations Committee on the Rights of the Child for the coalition to stop its deadly airstrikes against civilian targets in Yemen (NPM News)Yakov F.); amid a backdrop(The counter-offensive comes amid a backdrop of losses for Isis in the Palestinian refugee camp Yarmouk, in the Syrian capital of Damascus, after militants invaded it on 1 April.4uzhoj); in the wake of(Airport security was extra tight in the wake of yesterday's bomb attacks. • In fact, in recent decades the rash of sicknesses in the wake of indoor air pollution has led to the coining of the term "sick-building syndrome".aldrignedigen)
on top of(Гера); versus(Moscowtran); following(решила вернуться в проект на фоне подъема экономики Камеруна /decided to re-enter the frame, following an upswing in Cameroon's economy indrajiita)
seekingalpha.com aldrignedigen); at the background of (чего-л., кого-л.); in the background; behind (чего-либо Viacheslav Volkov); against the background; with the backdrop of (The protests come with the backdrop of a federal government shutdown, with GOP lawmakers and the White House locked in a standoff with Democrats over a funding bill. Mr. Wolf)