Back of weld
[化] 焊縫背面
?? 詞語組成解析
back
[b?k]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背書于;下賭注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
of
[?v]
prep. 關于;屬于…的;由…制成;
aux. 助動詞 [非標準用語、方言] =have [主用于虛擬語氣];
weld
[w?ld]
vt.& vi. 焊接;使緊密結合;
n. 焊接點;黃色植物染料;
??? 情景例句
Hear, hear!
我們洗耳恭聽！
We are sure the contract can be carried out smoothly.
我們確信合同會順利執行的。
she rang up her daughter and asked for her help in what she described as a little spot of bother.
她只得打電話向女兒求援，說她碰到了一點兒小麻煩。