To book something in advance

• To arrange to have a place, service, or item kept for you

提前预订

• 安排将席位、服务或物品为自己保留

To keep something back for future or special use

• To set aside part of a supply

为将来或特殊用途保留

• 从现有供给中划出一部分

To retain a right or decision for oneself

• To refrain from expressing or deciding now

保留某项权利或决定权

• 暂不表态或暂缓作出决定

A supply kept back for future use

• Something saved as a backup

为将来保留的存量

• 备用之物

Money set aside to meet expected or unexpected costs

• Regulatory capital held by an organization

为预期或意外支出预留的资金

• 机构持有的监管资本

Known but undeveloped deposits of oil, gas, or minerals

已知但尚未开发的石油、天然气或矿产储量

A tract of land set apart for a particular purpose

• Especially a protected nature or wildlife area

为特定用途划定的一片土地

• 尤其是自然或野生动物保护区

Troops held back to support the main force if needed

为支援主力而后方待命的部队

A team member not starting, available to replace another

非首发队员，可替补出场

Controlled, cautious manner; lack of openness or warmth

• Self-restraint in words or actions

克制谨慎的举止，不外露或不热情

• 在言行上的自我克制