theart.那；这；这些；那些adv.（用于比较级前）更加；用于最高级前；(用于形容词、副词比较级前)越 ... 越 ...the devil of it最倒霉的事；最不幸的事；祸事

1. The welding rod threw off a shower of sparks.
   焊条火星四溅。
2. Two cores melting speed can keep consistence is very important for twin electrode single arc welding to be stabilized.
   两焊芯熔化速度能否保持一致是双电极焊条单弧焊过程能否稳定进行的关键。