with half an eye Idiom

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with half an eye

at a glance；without effort看一眼；一瞥；不费劲
Anyone with half an eye could see that the young teacher was in love with the girl．任何人一看就知道那位青年教师已爱上那位女孩了。

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see with half an eye

see with half an eye
Notice the obvious, tell at a glance, as in I could see with half an eye that he was sleeping through the entire concert. This hyperbolic expression, which presumably alludes to an eye that is only half-open, was first recorded in 1579.

see with bisected an eye

see with bisected an eye
Notice the obvious, acquaint at a glance, as in I could see with bisected an eye that he was sleeping through the absolute concert. This abstract expression, which apparently alludes to an eye that is alone half-open, was aboriginal recorded in 1579.

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with bisected an eye

at a glance；without effort看一眼；一瞥；不费劲
Anyone with bisected an eye could see that the adolescent abecedary was in love with the girl．任何人一看就知道那位青年教师已爱上那位女孩了。 Dictionary