look for a needle in a haystack
1. 大海捞针
You can never find him in such a large crowd of people. You're looking for a needle in a haystack.
在这么一大群人里你不可能找到他, 你简直是在大海捞针。
习惯用语(as) sharp as a needle1.■非常机敏的; 异常聪明的(as) true as the needleto the pole1.■[废]象指南针一样可靠; 非常可靠get [have] the needle1.■恼怒, 急躁; 抑郁give (sb.) the needle1.■刺激, 使人恼怒, 挖苦某人hit the needle1.■射中靶心, 击中要害like [as] a needle in a bottle [bundle] of hay1.■有如海底捞针on the needle1.■有服用毒品瘾, 嗜毒成瘾seek [look for] aneedle in a meadow1.■在草堆里找针; 海底捞针thread a needle1.■穿针引线; 完成一件困难的工作thread the needle1.■完成艰难的任务needle time1.■[英]无线电播放唱片的时间特殊用法adjusting needle1.■调准[调节]针air-vent needle1.■通气针antimony needle1.■锑针artery needle1.■动脉注射针, 宰牲血管中注射(盐水用)针astatic needle1.■无定向磁针bearded needle1.■钓针, 弹簧针bent-shank needle1.■曲柄唱针blockade needle1.■封闭针bushing needle1.■拉管头(康宁拉管法)cactus needle1.■仙人掌式唱针cement needle1.■水泥硬固检验计cemented needle1.■粘合针头closed-end needle1.■闭端(管状)针compass needle1.■罗盘针cross-pointer needle1.■交叉指针cylindrical steel needle1.■圆柱形钢管插针detachable needle1.■可折卸[活动]针头devil's daring needle1.■维基尼阿铁线莲(产于美洲)dial needle1.■刻度[标度]盘指针dipping needle1.■磁倾针dissecting needle1.■解剖针dotting needle1.■点孔针double sheathed needle1.■双套针管enriching needle1.■加浓针, 燃油量控制针etching needle1.■刻针; 蚀刻用钢尖笔 feathery needle(s)羽毛针状体feeder needle1.■供料机冲头fiber needle1.■纤维唱针fine needles1.■细针状体float needle1.■浮针fuel injection needle1.■喷油针Gillmore needle1.■(水泥稠度试验用)吉尔摩针hypodermic needle1.■皮下注射针ice needle1.■冰针idling adjusting needle1.■空转(调整)针indicating needle1.■指针inoculating needle1.■接种针jet needle1.■喷油针, (汽化器的)油量控制针knife-shaped needle1.■刃形指针larding needle1.■肥肉馅灌注针latch needle1.■钓针machine needle1.■机器(缝)针magnetic needle1.■磁针mariner's needle1.■罗盘针measuring needle1.■量针meat sewing needle1.■(包扎洋火腿用)缝合针microscopic needle1.■制造显微标本用机miner's dip needle1.■矿用磁倾仪moving needle1.■可动磁针nitride needle1.■针状氮化物packing needle1.■打包针pickle (pumping) needle1.■(注射腌渍用)盐水注射针pick-up needle1.■唱针platinum needle1.■白金针, 接种针pointer needle1.■指针Procter needle1.■葡氏压实锤, 葡氏密实度测定针pumping needle1.■(肉类)注射用针recording needle1.■记录针reproducing needle1.■唱针right-left needle1.■左右摆动式指针roller bearing needle1.■滚针轴承滚针sapphire needle1.■宝石唱针simple insert needle1.■普通插入式针头slow-running needle1.■低速调整针spill needle1.■放泄针spray needle1.■喷雾针spring needle1.■【纺】弹簧针steering needle1.■控制[指令]指针straight needle1.■直穿针syringe needle1.■注射器针头testing needle1.■测试针thick needle1.■粗针头thick-walled needle1.■厚壁针头thorn needle1.■刺针(一种软唱针, 类似仙人掌唱针或纤维唱针)touch needle1.■探针, 试针tracer needle1.■触针, 描形针transfer needle1.■接种针valve needle1.■阀针vertical needle1.■竖直指针vibrating needle1.■振动磁针warp knit machine with latch needle(s)1.■舌针经编机water needle1.■【采矿】水针