Disruptive students are difficult to remove.
Those with extensive root systems are difficult to remove.
Proteinic stains, such as egg, milk, and blood, are difficult to remove by detergent action alone.
Some tenants say these fees are difficult to remove, even when they are applied in error.
It is an expensive and time-consuming effort because asbestos is often found in materials that are difficult to remove, like wall covering and joint casings.
"The one problem with steel doors is that they do get dents and dimples," Mr. Campbell said, explaining that such blemishes are difficult to remove.
Homes like Mr. Luo's are known in China as nail houses "because such buildings stick out and are difficult to remove, like a stubborn nail," according to Xinhua, the official Chinese news agency.
While it is a myth that porcupines can 'shoot' their quills at attackers, the quills do come away easily when touched and are difficult to remove once they are stuck in flesh.
Therefore, most burrs at intersecting holes are difficult to remove.
Introduction: Plaque and trapped debris that accumulate gingivally to orthodontic wire are difficult to remove.
Complexating agents are used to avoid side-reactions but are difficult to remove from mixture.
