後來股購了下，說是-----

LD
From Wikipedia, the free encyclopedia

In science and mathematics:

Lethal dose#, where "#" represents the percentage of test organisms killed by a specific dosage (of drugs, radiation, etc.), e.g. half will die at LD50.
The logarithm of base 2, ld(x) = log2(x), from the Latin logarithmus dualis.
Lunar distance, the distance between the Earth and the Moon and a measure of navigation.
Linkage disequilibrium, when seemingly independent alleles have different rates of appearance (thanks to fitness concerns, etc.) in genetics.
lactate dehydrogenase, an enzyme in plants and animals
London dispersion forces, weak intermolecular forces

In technology:

Laserdisc format, an obsolete optical disc video/data format and predecessor to Digital Video Disc (DVD).
ld, the linker command on Unix and Unix-like systems.
Long distance, a telephone call to another area sufficiently far away to be charged at a higher rate.
Loop Disconnect dialing.
ld, an instruction on a Z80 CPU.
Line Dubbed, a term for pirate copies with an audio track, which has been ripped from the line out connection of a projector
In politics:

Liberal democracy, a form of government based on rule of the people (democracy) tempered by the rule of law and natural rights (liberalism)
A form of debate (Lincoln-Douglas debate)
In television:

Lorraine "L.D." Delacorte, a character from the Degrassi series played by Amanda Cook.
Larry David, sometimes referred to as L.D. in the television show Curb Your Enthusiasm.
Latin Disciples, the name of a gang in television series Day Break
Low-definition television (LDTV)
In music:

Little Doses, a Scottish alternative rock band
Luis Dubuc
LD can also refer to:

Liberian dollar, the currency of Liberia
Libyan dinar, the currency of Libya
Liberty dollar, the private currency by norfed
Licensed Dietician
Lincoln-Douglas debate, a form of debate
Line Drive, a trajectory-related inference and statistic of a batted ball in baseball.
Learning disability, a condition that can impair learning through standard methods
Lilian day, a variant of the Julian day.
Lucid dreaming, a dream in which one is conscious of dreaming as it is happening.
Long distance relationships
Lighting designer, the person in charge of lighting in theatre.
Air Hong Kong and Linea Turistica Aerotuy, airlines with IATA code LD.
Liquor drink, a drink composed of a Distilled beverage and a drink mixer.
LD (cigarette), a brand of cigarette from the Gallaher Group.
Living Dangerously, a ECW PPV
Louis-Dreyfus Group, a French commodities trading firm
Liquidated Damages, a figure in Contract Law
Listening device, used in covert investigations
Ld (Capital L with a lower case "d") is the abbreviated form of:

Lord, a peer of the realm in the United Kingdom.
Lordi, a hard rock band