devotion of time and attention to gaining knowledge of academic subject. Rooms that a person studies or reads in. To focus on learning something usually at school.

Adrenal-cortex hormone (trade names Hydrocortone or Cortef) that is active in carbohydrate and protein metabolism.

Happening frequently or without pause. Thing that happens always or at a regular rate.

have effect on.

physical substance. be significant.

Set of changes that occur slowly and naturally. perform mechanical or chemical operations on.

person who is studying or has expert knowledge of one or more of natural or physical sciences. People who are trained in a science.

regulatory substance produced in organism and transported in tissue fluids such as blood.

Blood flowing through the circulatory system.

Being in a very anxious state. To be in a state of mental tension due to problems.

Act of getting knowledge. To get knowledge or skills by study or experience.

Always or often doing something, e.g. lying.

Used before you explain something simply, clearly.

nectar-feeding insect with two pairs of large wings. Insects with large and colorful wings. split piece of meat or fish almost in two.

in most cases.