Sentence examples for lines is tricky from inspiring English sources

Drawing crisp lines is tricky.

Using this technique to create a robust cell line is tricky and highly inefficient.

But drawing the line is tricky, and regulations are in flux.

But the deeper lines are trickier: space is so tight that there is nowhere for waste heat to go, which makes traditional air-conditioning impossible.

All sense of direction was surrendered to the newly built expanse of tarmac and concrete and confusing lines, which was tricky as I was marching and marching while desperate for the loo.

Barajas airport is 13km north-east of the city centre and is served by frequent trains on Metro line 8, but the underground journey is tricky with at least one change at Nuevos Ministerios station (3).

The bottom line is timeliness -- like lateness -- is tricky to understand, and isn't fully.

This stuff is tricky!

Navigating underwater is tricky.

But this is tricky.

Legislating happiness is tricky.