buckle on

基本解释

Belts: White leather, with a silver buckle on the waistbelt .
皮带：白色皮制，在腰带上有银质皮带扣。
The four states of Kansas, Oklahoma, Arkansas, and Missouri make up the brass buckle on that tough but pliable leather belt.
堪萨斯，俄克拉荷马，阿肯色和密苏里四个州组成了这条坚韧而柔软的皮带上的四颗铜扣。
It was a period when the religious exiles were accustomed to Buckle on their armor, and practise the handling of their weapons of war.
在那个时候，那些浪迹天涯的教徒惯常披甲戴盔，手持打仗的兵器进行操练。

So the need to turn off the TV, put the video games away, buckle down on your work, making sure that parents are checking their kids' homework and talking to their teachers -- (applause) -- being accountable, being responsible -- that's what's going to make sure that we continue to thrive, we continue to excel into the future.
WHITEHOUSE: Help for Homeowners in the Hardest Hit States
Those threats, if carried out, would damage China's interests seriously, so its use of them suggests that it hopes it can persuade Mr Obama to buckle—if not on this sale then perhaps on Taiwan's mooted future purchases of advanced jet-fighters.
ECONOMIST: Geopolitics