The idiom describing that one is too weak to do anything is useless and can't solve the problem.

A drop in the bucket-save a car burning firewood with a glass of water. Metaphor power is too small to solve the problem.

Helpless-help: benefit, help. Not helpful or beneficial to things. Metaphor does not solve the problem.

Less porridge and more monks-a metaphor for fewer things and more people, and insufficient distribution.

A glass of water saves wages-it is useless to save a car burning firewood with a glass of water.

People are overstaffed-floating: super. It originally means that a person's talent and virtue are higher than his salary. Later, it means that there are too many people or things at work.

It's no use.-it's no use.

Painting cakes to satisfy hunger-painting cakes to satisfy hunger. Metaphor is to comfort yourself with fantasy.

Throw eggs at the stone-touch the stone with eggs. Metaphor does not estimate their own strength, bring about my own destruction.

Hit the stone with an egg-hit the stone with an egg. Metaphor does not estimate their own strength, bring about my own destruction.

Demand exceeds supply-supply: supply, supply; Demand: demand, need. The supply does not meet the demand.

In vain-it took effort, but it was useless.

Fishing for the moon in the water-fishing for the moon in the water. Metaphor is to do something that can't be done at all, and it can only be in vain.

Ask the tiger for skin-ask the tiger for skin. Never discuss with the wicked and ask him to give up his own interests.

Grab-grab: grab. Tickle through your boots. Metaphor speech composition is irrelevant and inappropriate, and fails to grasp the main points. Or do things without grasping the key.

In vain, useless.

In vain: in vain. In vain.

Unable to return to heaven-return to heaven: metaphor is powerful and can transfer a situation that is extremely difficult to recover; Weakness: no strength. (1) describes the development of the situation, which has reached an irreversible stage. (2) metaphor situation or serious illness, can't save.

Weak strength-weak strength. It's not enough just to resist difficulties.

Use the gladiator's arm as a car-when: stop. Mantis raised his forelimbs and tried to stop the car from moving forward. It is a metaphor for doing what strength can't do, and it is bound to fail.

Shake the tree-ants want to shake the tree. Metaphor is overreaching.