名詞 lagging:

1. used to wrap around pipes or boilers or laid in attics to prevent loss of heat

動詞 lag:

1. hang (back) or fall (behind) in movement, progress, development, etc.
   同義詞：lag, dawdle, fall back, fall behind
2. lock up or confine, in or as in a jail
   同義詞：imprison, incarcerate, lag, immure, put behind bars, jail, jug, gaol, put away, remand
3. throw or pitch at a mark, as with coins
   同義詞：lag
4. cover with lagging to prevent heat loss
   同義詞：lag

1. One that lags; a straggler.
   落后者; 落伍者
2. Be modest, otherwise you will lag behind.
   要謙虛，否則就要落后。
3. If you lag your hot water tank, you'll save money on your fuel bill.
   如果你給熱水箱裝上外套，你就可以少付燃料費帳了。
4. A Soviet crash program to catch up with the West in designing powerful new computers is beginning to pay off, but the Russians still lag far behind, according to industry reports.
   根據(jù)電腦業(yè)報導，蘇聯(lián)為了在設計強力新型電腦上趕上西方所實行的緊急計劃，已開始收效，可是俄國人仍遠遠落后。

lag.ging

n.（名詞）
Insulation used to prevent heat diffusion, as from a steam pipe.
絕熱材料：用來防止熱量散失的絕熱材料，如從蒸汽輸送管上
A wooden frame built especially to support the sides of an arch until the keystone is positioned.
支拱板條：專門用來在拱頂石放置好以前支撐拱的兩邊木架子

來源：
From lag 2
源自 lag2