全部

1·The main rason of leading to overhigh hydrogen content was insufficient anneal after forged.

导致氢含量过高的原因可能在于锻后退火不足。

2·Rason offers a port on the Sea of Japan, something denied China since it ceded Outer Manchuria to Russia in the mid-19th century.

罗先向中国提供其在日本海上的港口使用权，自从19世纪中期中国将外满洲割让给俄国以来，该港口曾一直拒绝中国使用。