sustain：释义

To keep in existence; maintain.

To supply with necessities or nourishment; provide for.

To support from below; keep from falling or sinking; prop.

To support the spirits, vitality, or resolution of; encourage.

To bear up under; withstand: can't sustain the blistering heat.

To experience or suffer: sustained a fatal injury.

To affirm the validity of: The judge has sustained the prosecutor's objection.

To prove or corroborate; confirm.

To keep up (a joke or assumed role, for example) competently.