deficiency

"My friend told me there was something in the box, but I didn't know what it was yet. "

"We need to bring the balance of power into equation"

"He will need lots of practice with the lines before he performs them."

"My sister is very helpful, especially when it comes to organizing things. "

"The student's performance on the math test corresponded to the level of effort she put in during the week. "

"The troops went hungry because of the insufficiency of their supplies."

"Salt is an essential for cooking a good soup. "

"During the centuries, the people of Ireland struggled constantly to assert their right to govern themselves."

"In a small number of horses, muscle weakness may progress to paralysis."

"The research station that houses Wang and his team is outside Lijiang, a city of about 1.2 million people."

"The teacher patiently explained the math problem, and the students were able to understand the steps involved. "

"The student's performance showed a clear inadequacy in understanding the material. "