What Johnson meant was that with his shortsightedness he'd have to creep along the ground on all fours to be able to see those things that it is necessary for a botanist to see.
约翰逊的意思是这样：以他的近视程度，他不得不四肢着地的趴在地上才可以看到那些对于植物学家来说必须要看到的东西。
In the evenings after work, Mike king can often be found crouched down on all fours in the living room playing bucking bronco with his kids.
下班后的傍晚里，常常能发现迈克这个孩子王在起居室里蹲在四个人下面跟孩子们玩骑马游戏。
It walked on its hind legs but also could drop to all fours, and scientists told reporters that could prove to be a missing evolutionary link.
地爪龙以二足直立走路，但也能低身以四足行走，科学家告诉记者说，这可能证明是一项失踪的进化链结。
Nidal, with his cheeky smile, had crawled around on all fours pretending to be a cat, miaowing daringly round the legs of the girls.
尼达曾经四肢趴在地上，装作一只猫到处乱爬，厚着脸皮微笑着，大胆地绕着女孩们的大腿喵喵叫。
O.K., it has to be close by, because I had it right before I was hunting around on all fours in front of the liquor cabinet.
它肯定就在旁边什么地方，因为就在我绕着餐具柜的四面慢慢搜寻之前我还拿着它呢。
Wigs may be widely used, but they are still not on all fours with beautiful natural hair.
假发可以广泛地应用，但它们毕竟不能同美丽的自然头发相比。
Wigs may be widely used, but they are still not on all fours with beautiful natural hair.
假发可以广泛地应用，但它们毕竟不能同美丽的自然头发相比。
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