单词harden-up
网络: 使坚硬；变硬；坚实不摧
Extra physical training was put on the schedule during bad weather to "harden" up the recruits .
额外的身体训练在恶劣的天气下也必须进行，以此来“锻炼”新兵。
Harden up a little, we need more speed.
把帆索拉紧一点，我们需要加快速度