1.by hand表示“手工，用手做成”，“用手;（用）手工;（信件）亲手交付，由专人递送”
The watch is made by hand. 这块表是手工做的。
Her wedding dress was stitched by hand.
她的婚纱是手工缝制的。
Rice farmers here still plant and harvest their crops by hand.
这里种植水稻的农场主仍是人工种植和收割庄稼。
She addressed them by hand in her beautiful italic script.
她用漂亮的斜体字写明了收信人姓名和地址。
Election boards will count the ballots by hand.
选举委员会将人工计票。
Martin helped his father dig the water gardens out by hand. Thus he discovered his interest in gardening.
马丁亲手帮他父亲修建起了水景园，就这样对园艺产生了兴趣。
Until the 1980s almost all olives were packed into jars by hand.
直到20世纪80年代，几乎所有的橄榄都是手工装罐的。
It is worth taking the trouble to sieve the fruit by hand.
值得费点劲用手挑挑果子。
We picked the corn by hand and we fed it to the hogs and the cows.
我们用手掰下玉米，把它喂给猪和牛吃。
Farm-workers milked cows by hand.
农场工人用手挤牛奶。
2. in hand表示“在手头，在进行中”。
I still have some money in hand. 我手头还有些钱。
Let us address ourselves to the matter in hand.
让我们投入手边的工作。
The work is still in hand. 那项工作仍在进行中。
The Olympic organisers say that matters are well in hand.
奥运会的组织方说各项事务都在掌控之中。
提示
（1）.in the hand表示“在手中”。
He has a bag in the hand. 他手里拿着一只包。
不可说by hands，by the hands
（2.）hand in hand手牵手，手拉手地
Couples walked hand in hand along the front.
对对情侣手牵手沿河边散步。
I saw them making their way, hand in hand, down the path.
我看到他们手拉手沿着小路往前走去。
They walked away hand in hand.
他们携手离去。
For us, research and teaching go hand in hand
对我们而言，研究和教学是齐头并进的。
Higher returns and higher risk usually go hand in hand.
更高的收益通常伴随着更高的风险。
Industrial progress should go hand in hand with the development of agriculture.
工业的发展同农业的发展密切相关。
In all political matters these men went hand in hand.
在所有政治问题上，这些人采取共同行动。
Theory must go hand in hand with practice.
理论必须同实践相结合。
Let us go hand in hand to create a healthy life.
让我们携手并进，共创健康美好的生活。
3.on hand表示“现有待用”。
I have a large stock on hand. 我手头有大批存货。
We always keep some candles on hand in case there's an electricity cut. 我们手头总备有一些蜡烛，以供停电使用。
There was simply no cash on hand to meet the cost of food.
手头实在没有现金可以购买食品。
The Bridal Department will have experts on hand to give you all the help and advice you need
婚礼用品部会有现成的专家为您提供所需的一切帮助和建议。
Give away any food you have on hand, or lock it up and give the key to the neighbours
把手头的所有食物都送给别人，或者把食物藏好锁起，然后将钥匙交给邻居。
Our team of experts will be on hand to offer help and advice between 12 noon and 7pm daily.
每天中午12点到下午7点，我们的专家小组将随时提供帮助和建议。
Riot police are on hand but have not been confrontational.
防暴警察随时待命，但还没有出现冲突场面。
4.at hand表示“在附近”“ 在手头上，在手（身）边，即将来临”。
Help was at hand.
援助近在咫尺。
Having the right equipment at hand will be enormously helpful.
手头上有合适的设备将会帮上大忙。
Extra boiling water should be kept at hand just in case it is needed.
身边应多准备一些开水，以备不时之需。
Somewhere close at hand a train rattled by.
一辆火车从我的身边轰隆隆地开过。
His wife remains behind in Germany, but Jason, his 18-year-old son, is closer at hand.
他的妻子还留在德国，但他18岁的儿子贾森就在身边。
The bus station is close at hand. 公共汽车站就在附近。
Realizing that his retirement was near at hand, he looked for some additional income.
意识到自己快要退休了，他想要挣些外快。