the smallest recognized amount by which a price of a security or future may fluctuate.
3
a parasitic arachnid that attaches itself to the skin of a terrestrial vertebrate from which it sucks blood, leaving the host when sated. Some species transmit diseases, including tularemia and Lyme disease.
4
a fabric case stuffed with feathers or other material to form a mattress or pillow.
动词
1
(of a clock or other mechanical device) make regular short sharp sounds, typically one for every second of time that passes.
