1.   Because measuring electromagnetic fields is difficult and time-consuming, researchers estimated household exposure based on the size of electric wires and their proximity to the house.

2.   Globular clusters are known to contain some of the oldest stars in the universe, but measuring those ages is far from straightforward.

3.   In some old or owner-built houses, the studs are set every which way and measuring is impossible.

4.   Measuring is important when making bread, however.

5.   Measuring the temperature is easiest with a roast.

6.   Measuring how popular is difficult to gauge.

7.   Measuring the boom is difficult.

8.   Measuring the sentiments is, of course, difficult.

9.   Measuring pedaling effects is far more complicated.

10.   Measuring the success is tricky, because crops abandoned in the Valle may pop up under the Amazon canopy where they are harder to eradicate.