Example sentences of "but it [is] often difficult [verb] " in BNC.
Next page| No | Sentence |
|---|---|
| 1 | A chance finding , outside the mainstream of scientific research , can sometimes be very valuable , but it is often difficult to see its potential . |
| 2 | But it is often difficult to judge . |
| 3 | Other places were also hit savagely from time to time , but it is often difficult to tell from the registers which particular disease was responsible for an unusually high number of deaths . |
| 4 | By changing the excitation frequency we can probe the upper-state vibrational levels , but it is often difficult to identify the ν'=; 0 level , which may have low probability of excitation or emission . |
| 5 | But it 's often difficult to see for yourself how much is in your account . |