n. 压载物, 压舱物

[经] 底货, 压舱货

Ballast \Bal"last\ (b[a^]l"last), n. [D. ballast; akin to Dan.
baglast, ballast, OSw. barlast, Sw. ballast. The first part
is perh. the same word as E. bare, adj.; the second is last a
burden, and hence the meaning a bare, or mere, load. See
{Bare}, a., and {Last} load.]
1. (Naut.) Any heavy substance, as stone, iron, etc., put
into the hold to sink a vessel in the water to such a
depth as to prevent capsizing.

2. Any heavy matter put into the car of a balloon to give it
steadiness.

3. Gravel, broken stone, etc., laid in the bed of a railroad
to make it firm and solid.

4. The larger solids, as broken stone or gravel, used in
making concrete.

5. Fig.: That which gives, or helps to maintain, uprightness,
steadiness, and security.

It [piety] is the right ballast of prosperity.
--Barrow.

{Ballast engine}, a steam engine used in excavating and for
digging and raising stones and gravel for ballast.

{Ship in ballast}, a ship carrying only ballast.


Ballast \Bal"last\, v. t. [imp. & p. p. {Ballasted}; p. pr. &
vb. n. {Ballasting}.]
1. To steady, as a vessel, by putting heavy substances in the
hold.

2. To fill in, as the bed of a railroad, with gravel, stone,
etc., in order to make it firm and solid.

3. To keep steady; to steady, morally.

'T is charity must ballast the heart. --Hammond.