1、有困难
... air valves 航空阀门 be in difficulty 有困难 deactivated soybean meal 钝化大豆饼 ...
2、处境困难
... make a difference区别对待；起(重要)作用；有影响 make no difference没有...作用或影响 be in difficulty处境困难 ...
3、处于困境
... remain 逗留，停留 in possession of 占有，持有 be in difficulty 处于困境，处境困难 ...