| 31. | Internal trade is more difficult because of physical barriers.
|
| 32. | Surveillance cameras, security staffing and physical barriers are among a host of things being studied.
|
| 33. | Without physical barriers, it is very hard to police.
|
| 34. | Other variations of indirect grilling place a physical barrier between the food and the fire.
|
| 35. | Security measures included physical barriers designed to prevent overcrowding.
|
| 36. | There was no physical barrier to going to the Americas from Asia during that period.
|
| 37. | They also think the bridge needs better physical barriers.
|
| 38. | The border between Israel and the West Bank is not marked by a physical barrier.
|
| 39. | Other plants have chemical or physical barriers to self-pollination.
|
| 40. | "Since 9 / 11, everyone wants to have the actual physical barrier, " he said.
|
