缺成分用英语怎么说

"Lack" is the word commonly used to describe a deficiency or the absence of something. It can be used to describe a deficiency in a physical substance, such as a lack of food or water, or a deficiency in a quality or attribute, such as a lack of courage or knowledge.
For example:
"There is a lack of evidence to support the theory." (缺乏支持这一理论的证据。)
"She was criticized for her lack of preparation for the meeting." (她因为没有准备好会议而受到批评。)
"The drought has caused a lack of water in the region." (干旱导致该地区缺水。)
It is also possible to use the phrase "in short supply" to describe a deficiency or scarcity of something.
For example:
"Due to the high demand, face masks are in short supply." (由于需求量大，口罩短缺。)
"There is a shortage of qualified candidates for the position." (合格的候选人短缺。)