由此

1. 要是做不到这一点，他们必须对由此产生的后果负责。
   Failing this, they will be held responsible for all the consequences arising therefrom.
2. 他既没打电话又没写信，这使她难以撇开由此而产生的一种隐约的担忧心情。
   She found it difficult to set aside a vague feeling of anxiety caused by his failure to call or write.

此的英语翻译：