perihelion

n (pl -lia / -lIE;-lIE/) point in the orbit of a planet, comet, etc at which it is nearest to the sun 近日点（行星、 彗星等轨道上距太阳最近的点）.

perfidy, perforate, perforating, perforation, perforce, perform, performance, performer, performing arts, perfume, perfumed, perfumer, perfumery, perfunctorily, perfunctoriness, perfunctory, pergola, perhaps, peri-, perigee, peril, perilous, perimeter, period, period piece, periodic, periodic table, periodical, periodicity, peripatetic, peripatetically, peripheral, peripherally, periphery, periphrasis, periphrastic, periphrastically, periscope, periscopic, perish,