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- Reproduction of the head or white or black, gray or all brown all winter in the head stripes or a clear Hard beak, slightly clasp, and some species also have a colour patches. 繁殖期头部或纯白，或全黑、全灰或全褐；冬季头部出现条纹或不清晰的斑点。喙坚硬，略呈钩状，有些种还具一个色斑。
- It is hard to sleep without a cooler in this room. 没有空气调节器，在这间屋里很难入睡。
- Phoebe's beak was so hard and pointy. 菲比的嘴又硬又尖。
- John felt it hard to rig out his family. 约翰感到难以为一家大小置备衣着。
- The hard core in the party make all the decisions. 这个党的核心成员决定一切。
- Hard copy is computer output on paper, printing or graphics. 硬拷贝是出现在纸上、印刷上或图表上的电脑输出。
- I scrubbed hard at the stain to see if I could get it off. 我使劲擦这个污迹，看能不能将它去掉。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
- He pushed hard on the brake pedal to avoid a collision. 他使劲踩下煞车踏板以避免撞车。
- One can not learn a language well unless one works hard. 学好一种语言非下苦功不可。
- Let's collect the sap before its consolidation into a hard mass. 让我们在树液坚固成团之前将之收集起来。
- He owes his opulence to work hard. 他的财富乃辛勤工作得来。
- She was trying hard to disgorge a fish bone. 她拚命想把鱼刺吐出来。
- The emery is a hard metallic substance. 金刚砂是非常坚硬的金属物质。
- Hard training will fit them to run long distances. 严格的训练将使他们能跑长距离。
- Seth really took it hard when his old dog died. 塞思的那条老狗死的时候，他确实怏怏不乐。
- Heavy taxes indispose a citizen to work hard. 重税于国民不愿意辛勤工作。
- It was hard work getting the children off to bed. 哄孩子们去睡可不是容易的事。
- We must take a hard look at our finances. 我们应该密切注意财务问题。
- She earned her place in the team by training hard. 她由于刻苦训练而在队里取得了地位。
