"cusp" の定義と意味

Cusp

先端

the point or curve formed by the intersection of two arcs or curves, commonly seen in the tracery of Gothic architecture

先端

small elevation on the grinding surface of a tooth

先端

a thin triangular flap of a heart valve

例

His personality falls on the cusp between introversion and extroversion.

Their relationship is on the cusp between friendship and romance.

The weather is on the cusp between summer and autumn, with warm days and cool evenings.

She celebrates her birthday on the cusp between Pisces and Aries.

She was on the cusp of a new chapter in her life.

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