All sleds have specific minimum and maximum weight limits.

所有雪橇都有特定的最小和最大重量限制。

Tom has a track record of succeeding when young. He was given special permission to compete at the Youth Olympics when he was three years under the minimum age limit.

汤姆从小便卓尔不群。他曾被破格允许参加青年奥运会，他当时比青奥会最低年龄限制小3岁。