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pheasant-tailed jacana (Hydrophasianus chirurgus)
The pheasant-tailed jacana, known as 'the ballerina of the water' for its beautiful appearance.
(geometry) spherical angle
The calculation of the spherical angle is a part of geometry.
a street corner / a city street
He was playing the guitar at the street corner.
all's well that ends well
The exam ended and the results were good, so I thought 'all's well that ends well'.
(linear algebra) positive-definite matrix
A positive-definite matrix is an important concept in linear algebra.
(linear algebra) upper triangular matrix
In linear algebra, the upper triangular matrix plays a very important role.
(linear algebra) lower triangular matrix
A lower triangular matrix is a matrix where all the elements below the main diagonal are zero.
symmetrical pair, left and right pair
His shoes are a symmetrical pair, perfectly matching left and right.
(mahjong) a 役 (yaku, “hand”) of seven pairs, worth 2 翻 (han, “doubles”)
He made a seven pairs in mahjong.
cost-effectiveness, performance or quantity per cost
We need to evaluate the cost-effectiveness of this project.
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