Maintenance; Booking; Abide by; Stop;
Keep (food) fresh; Stay healthy;
Maintain, maintain; Support, support; Life, livelihood; Feed; Forage;
Third person singular: keep
Plural number: hold
Present continuous tense: keep
Past tense: keep
Past participle: reserved
[example]
To keep warm, they burned wood in a rusty oil drum.
They burned firewood in rusty oil drums to keep warm.
2、
The leftovers can be put in the refrigerator, where they can be kept for 2-3 weeks.
The leftovers can be kept in the refrigerator for two to three weeks.